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Class 10 Science chapter-wise assignments Pdf download - Acadpills

Class 10 Science Chapter-wise assignments Pdf

If you are searching for class 10th science chapter wise assignments pdfs then you are at right place. In this post we have uploaded class 10 science assignments in pdf form which you can download easily in free of cost. We provide most unique class 10 science printable assignments as per NCERT latest syllabus. All worksheets have been made carefully for all type of students, you can download these science assignments pdf in free of cost and can practice all these questions and boost your preparations and get better marks in your exams. first read the chapter from NCERT book and class 10 handwritten notes pdf then do the basic questions of NCERT book and also do the questions of reference book if you have any then only start solving these assignments. This will help you understand the chapters in more details and after solving all the class 10 science assignments pdfs you will be confident in your exam. solve one assignment in at most 1 week to boost your preparation and get better marks.

About CBSE NCERT Assignments for Class 10 Science pdf 

This free printable assignments for CBSE Class 10 Science with important chapter-wise questions are made by CBSE expert teacher having many years of experience in CBSE, students must practice NCERT Class 10 Science assignments on CBSE syllabus and books issued by NCERT. These class 10 science assignments pdf are made as per the latest NCERT book syllabus each important topics of your syllabus is covered very well. All type of possible questions are added in the assignments so that you can revise the topics if you forget that in any case, we use many reference books and coaching materials to made these science assignments.

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Benefits Of solving CBSE NCERT Assignments for Class 10 Science pdf 

• Help to practice lot of questions and understand concepts in better way.
• These assignments for Science Class 10 will help you revise the syllabus.
• Daily Practice of these assignments will help to develop a strong understanding of the concepts.
• You will also be able to save time during your class tests and exams.
• Give you an idea about type of questions asked in exam. 

About class 10 science assignments pdf 

• Available for all chapters.
• More than 200 questions of each chapters are given.
• Available in printable pdf format.
• Download in single click.
• All topics and concepts are covered very well. 
• Errorless assignments with all types of questions.

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Assignments For Class 10 Science

Assignments for Class 10 Science have been developed for Standard 10 students based on the latest syllabus and textbooks applicable in CBSE, NCERT and KVS schools. Parents and students can download the full collection of class assignments for class 10 Science from our website as we have provided all topic wise assignments free in PDF format which can be downloaded easily. Students are recommended to do these assignments daily by taking printouts and going through the questions and answers for Grade 10 Science. You should try to do these test assignments on a daily basis so that you are able to understand the concepts and details of each chapter in your Science book and get good marks in class 10 exams.

Important Questions and Answers for Class 10 Science

Experiments in class 10 Science Assignment

Case Study Based MCQ Class 10 Science

Assignments for Class 10 Science as per CBSE NCERT pattern

All students studying in Grade 10 Science should download the assignments provided here and use them for their daily routine practice. This will help them to get better grades in Science exam for standard 10. We have made sure that all topics given in your textbook for Science which is suggested in Class 10 have been covered ad we have made assignments and test papers for all topics which your teacher has been teaching in your class. All chapter wise assignments have been made by our teachers after full research of each important topic in the textbooks so that you have enough questions and their solutions to help them practice so that they are able to get full practice and understanding of all important topics. Our teachers at https://www.assignmentsbag.com have made sure that all test papers have been designed as per CBSE, NCERT and KVS syllabus and examination pattern. These question banks have been recommended in various schools and have supported many students to practice and further enhance their scores in school and have also assisted them to appear in other school level tests and examinations. Its easy to take print of thee assignments as all are available in PDF format.

Some advantages of Free Assignments for Class 10 Science

• Solving Assignments for Science Class 10 helps to further enhance understanding of the topics given in your text book which will help you to get better marks
• By solving one assignments given in your class by Science teacher for class 10 will help you to keep in touch with the topic thus reducing dependence on last minute studies
• You will be able to understand the type of questions which are expected in your Science class test
• You will be able to revise all topics given in the ebook for Class 10 Science as all questions have been provided in the question banks
• NCERT Class 10 Science Workbooks will surely help you to make your concepts stronger and better than anyone else in your class.
• Parents will be able to take print out of the assignments and give to their child easily.

All free Printable practice assignments are in PDF single lick download format and have been prepared by Class 10 Science teachers after full study of all topics which have been given in each chapter so that the students are able to take complete benefit from the worksheets. The Chapter wise question bank and revision assignments can be accessed free and anywhere. Go ahead and click on the links above to download free CBSE Class 10 Science Assignments PDF.

You can download free assignments for class 10 Science from https://www.assignmentsbag.com

You can get free PDF downloadable assignments for Grade 10 Science from our website which has been developed by teachers after doing extensive research in each topic.

On our website we have provided assignments for all subjects in Grade 10, all topic wise test sheets have been provided in a logical manner so that you can scroll through the topics and download the worksheet that you want.

You can easily get question banks, topic wise notes and questions and other useful study material from https://www.assignmentsbag.com without any charge

Yes all test papers for Science Class 10 are available for free, no charge has been put so that the students can benefit from it. And offcourse all is available for download in PDF format and with a single click you can download all assignments.

https://www.assignmentsbag.com is the best portal to download all assignments for all classes without any charges.

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NCERT Solutions for Class 10 Science

Class 10 Science | Chemistry Chapter 1: Chemical Reactions and Equations Chapter 2: Acids, Bases and Salts Chapter 3: Metals and Non-Metals Chapter 4: Carbon and its Compounds

Class 10 Science | Biology Chapter 5: Life Processes Chapter 6: Control and Coordination Chapter 7: How do Organisms Reproduce? Chapter 8: Heredity

Class 10 Science | Physics Chapter 9: Light – Reflection and Refraction Chapter 10: Human Eye and Colourful World Chapter 11: Electricity Chapter 12: Magnetic Effects of Electric Current

Class 10 Science | Environmental Studies Chapter 13: Our Environment

NCERT Solutions of Class 10 Science

Get the NCERT Solutions for Class 10 Science all chapters in Hindi and English Medium updated for new session 2024-25. According to revised syllabus and NCERT books issued for academic year 2024-25, there are only 13 chapters in 10th science. If you are planning to Score 100% in Class 10 Science based NCERT solutions, follow the two months preparation for 10th science . Class 10th Science solutions are solve problems related to the science curriculum provided by the National Council of Educational Research and Training (NCERT) in Bharat.

The 10th Science NCERT solutions cover various scientific concepts and topics that students study in their 10th-grade science textbook. Class 10 Science NCERT solutions serve as valuable tools for both students and educators. They provide structured guidance for learning scientific concepts, practicing problem-solving, and preparing for exams. These solutions can be found in the official NCERT textbooks, educational websites, and online platforms.

Science is interconnected with other subjects, such as mathematics, technology, and engineering. Studying science fosters interdisciplinary thinking, helping students see how concepts from different fields can be applied to solve complex problems. Tiwari Academy typically offers comprehensive solutions to the Class 10 Science NCERT textbook. These solutions include detailed explanations and step-by-step instructions for solving problems and understanding concepts.

Here are some tips on how to score well using Tiwari Academy’s Class 10 Science NCERT Solutions . This will help you to understand the concepts and to identify the areas where you need help. The solutions should not be used as a substitute for studying the textbook. Revise the solutions regularly. This will help you to retain the information and to prepare for your exams.

Class 10 Science NCERT solutions align with the CBSE board exam pattern and help students prepare effectively for their science exams. Some solutions may include interactive elements like activities and experiments that engage students in hands-on learning. These are aligned with the Class 10 Science syllabus , ensuring that students cover the required topics and concepts. Additional notes or explanations may be provided for teachers and parents to assist in explaining concepts to students. Many educational resources on Tiwari Academy are often available for free compared to traditional textbooks or coaching classes. This affordability can be advantageous for students and parents.

Students must effectively communicate their findings and ideas in science. This includes writing clear reports, making presentations, and engaging in discussions. Improved communication skills are beneficial in all areas of education.

Practice solving problems from the textbook and from the Tiwari Academy NCERT Solutions. This will help you to develop your problem-solving skills and to identify any areas where you need to improve. Use Tiwari Academy’s NCERT Solutions in conjunction with other resources, such as previous year exam papers and sample papers. This will help you to get a better understanding of the types of questions that are likely to be asked in your exams.

So, the students of UP Board also get the UP Board Solutions for Class 10 Science in Hindi Medium or English Medium. All the NCERT Solutions Offline Apps are fully updated for the current academic session. Apart from CBSE and UP Board Students, NCERT Solution is free for Bihar board, Gujrat Board, Uttarakhand Board, MP Board (Madhya Pradesh Board, Jammu and Kashmir Board of School Education (jkbose), whosoever are following NCERT Textbooks.

Scientific research often involves setbacks and failures. Learning to cope with failures and continue working toward a solution cultivates perseverance and resilience. For UP board (High School) students, Class X solutions are prepared in Hindi Medium. If the Student of any board whether CBSE or UP Board or any other board, facing any problem to get 10th Science Solutions in Hindi or English Medium, please contact us for help without any charge.

Key features of Class 10 Science NCERT solutions includes a wide range of scientific topics including physics, chemistry, biology, and environmental science. These topics include concepts such as force, energy, chemical reactions, reproduction, genetics, and more. Solutions provide clear and simple explanations that make complex scientific concepts easier to understand for 10th-grade students. No charge, no login or password, no promotion calls from Tiwari Academy, only peaceful study of science of standard 10.

All the solutions are updated for new academic session. Students of UP Board, MP Board, Gujrat Board and all other boards can use these solutions because they are following latest NCERT Textbooks for X . Make a study schedule and stick to it. This will help you to stay on track and to make sure that you cover all of the important topics. Find a study partner or group. Take breaks when you need them. It is important to take breaks when you are studying so that you do not get overwhelmed. Get enough sleep. I hope these tips help you to score well in your Class 10 Science exams.

Class 10 Science Chaptertwise Important Questions for Exams Practice

• Class 10 Science Chapter 1 Important Questions
• Class 10 Science Chapter 2 Important Questions
• Class 10 Science Chapter 3 Important Questions
• Class 10 Science Chapter 4 Important Questions
• Class 10 Science Chapter 5 Important Questions
• Class 10 Science Chapter 6 Important Questions
• Class 10 Science Chapter 7 Important Questions
• Class 10 Science Chapter 8 Important Questions
• Class 10 Science Chapter 9 Important Questions
• Class 10 Science Chapter 10 Important Questions
• Class 10 Science Chapter 11 Important Questions
• Class 10 Science Chapter 12 Important Questions
• Class 10 Science Chapter 13 Important Questions

Remember that consistency, thorough understanding, and practice are key to performing well in Class 10 Science. Science ignites curiosity and encourages students to ask questions and seek answers. This sense of inquiry extends beyond science classes and can motivate students to explore other subjects with the same level of curiosity. Tiwari Academy’s resources can be a valuable aid, but your dedication and effort play a crucial role in achieving good marks. There are a number of reasons why Tiwari Academy is considered to be one of the best platforms for Class 10 Science solutions .

1. Tiwari Academy’s NCERT solutions are written by experienced subject matter experts and cover all of the important topics in the textbook. The solutions are accurate and easy to understand.

2. Tiwari Academy’s NCERT solutions provide step-by-step solutions to all of the problems in the textbook. This helps students to understand how to solve problems and to develop their problem-solving skills.

3. Tiwari Academy’s NCERT solutions are aligned with the CBSE syllabus. This means that by studying the Tiwari Academy NCERT solutions, students can be sure that they are covering all of the important topics that will be on their exams.

4. Tiwari Academy’s NCERT solutions are available in both English and Hindi. Tiwari Academy’s NCERT solutions are available for free online. This makes them accessible to all students, regardless of their financial background.

Science education also involves discussions about ethical and moral considerations, such as responsible research practices and the implications of scientific discoveries. This promotes ethical reasoning and decision-making.

In addition to these general benefits, Tiwari Academy’s NCERT solutions for Class 10 Science can also help students to improve their conceptual understanding of the subjects. The solutions explain the concepts in the textbook in a clear and concise manner. This helps students to develop a deep understanding of the subjects, which is essential for success in their exams. Science often connects classroom learning to real-world issues and challenges. This practical application of knowledge helps students see the relevance of what they are learning and how it can be used to address real-life problems.

Improve their performance in their exams. The Tiwari Academy Class 10 Science NCERT solutions are designed to help students to answer the types of questions that are likely to be asked in their exams. Overall, Tiwari Academy is a great resource for students who want to excel in their Class 10 Science exams and to prepare for success in their future.

Class 10 Science Notes for Session 2024-25

• 10th Chemistry: Chemical Reactions and Equations Class 10 Science Chapter 1 Notes Read more
• 10th Chemistry: Acids, Bases and Salts Class 10 Science Chapter 2 Notes Read more

Here are some additional tips that may be helpful for students using Tiwari Academy’s NCERT solutions for Class 10 Science . Use the solutions in conjunction with your textbook and other resources. The solutions should not be used as a substitute for studying the textbook. Instead, they should be used to check your understanding of the concepts and to solve problems.

Don’t be afraid to ask for help. If you are having difficulty understanding a concept or solving a problem, ask your teacher or a friend for help. Practice regularly. Try to solve some problems from the textbook or from the Tiwari Academy NCERT solutions every day. Don’t give up. Science can be challenging, but it is also rewarding. If you keep practicing and don’t give up, you will eventually succeed.

10th Science Chapterwise Previous Years CBSE Board Questions

• 10th Science Chapter 1 Board Exam Questions
• 10th Science Chapter 2 Board Exam Questions
• 10th Science Chapter 3 Board Exam Questions
• 10th Science Chapter 4 Board Exam Questions
• 10th Science Chapter 5 Board Exam Questions
• 10th Science Chapter 6 Board Exam Questions
• 10th Science Chapter 7 Board Exam Questions
• 10th Science Chapter 8 Board Exam Questions
• 10th Science Chapter 9 Board Exam Questions
• 10th Science Chapter 10 Board Exam Questions
• 10th Science Chapter 11 Board Exam Questions
• 10th Science Chapter 12 Board Exam Questions
• 10th Science Chapter 13 Board Exam Questions

Tiwari Academy is known for providing educational resources and solutions for various subjects, including Class 10 Science. However, I cannot provide real-time information, and the reputation and quality of educational platforms can change over time. To determine why Tiwari Academy may have been considered the best for Class 10 Science Solutions, you would need to consider factors given below:

Tiwari Academy may have offered a wide range of study materials, including textbook solutions, practice questions, and explanations, to help students cover the entire Class 10 Science Solutions and syllabus. The platform may have provided high-quality and well-explained solutions to textbook questions and other practice problems, helping students understand concepts better.

Class 10 Science MCQ Tests for Session 2024-25

• Chapter 1: Chemical Reactions and Equations Class 10 Science Chapter 1 MCQ Read more
• Chapter 2: Acids, Bases and Salts Class 10 Science Chapter 2 MCQ Read more
• Chapter 3: Metals and Non-Metals Class 10 Science Chapter 3 MCQ Read more
• Chapter 4: Carbon and its Compounds Class 10 Science Chapter 4 MCQ Read more
• Chapter 5: Life Processes Class 10 Science Chapter 5 MCQ Read more
• Chapter 6: Control and Coordination Class 10 Science Chapter 6 MCQ Read more
• Chapter 7: How do Organisms Reproduce Class 10 Science Chapter 7 MCQ Read more
• Chapter 8: Heredity and Evolution Class 10 Science Chapter 8 MCQ Read more
• Chapter 9: Light – Reflection and Refraction Class 10 Science Chapter 9 MCQ Read more
• Chapter 10: Human Eye and the Colourful World Class 10 Science Chapter 10 MCQ Read more
• Chapter 11: Electricity Class 10 Science Chapter 11 MCQ Read more
• Chapter 12: Magnetic Effects of Electric Current Class 10 Science Chapter 12 MCQ Read more

Tiwari Academy have made its resources easily accessible, allowing students to study at their own pace and convenience. We offered free resources, that is why it have been a popular choice among students and parents. An easy-to-navigate website or app with a user-friendly interface can enhance the learning experience. If you encounter difficulties with a particular topic, don’t hesitate to seek help from your teacher, classmates, or online forums. Tiwari Academy may have a community or support system where you can ask questions.

Positive reviews and recommendations from students, teachers, or educational experts could contribute to its reputation as the best platform for Class 10 Science Solutions . Extra features like video tutorials, sample papers, and tips for exam preparation may have made Tiwari Academy stand out. As the exams approach, dedicate time to revision. Go through your notes and Tiwari Academy’s solutions again. Focus on problem-solving, and make sure you’re confident in your understanding of all topics.

To determine whether Tiwari Academy is still considered the best for Class 10 Science Solutions in 2024-25, check recent reviews, conducting online research, and asking for recommendations from teachers, classmates, or educational forums. Keep in mind that educational platforms can evolve and change, so it’s important to verify their current status and effectiveness. Regularly assess your progress by taking mock tests or quizzes. Tiwari Academy may have such resources available. Analyze your performance, identify weak areas, and focus on improving them.

NCERT of all chapters (Physics, Chemistry and Biology) are given in the section of solution. Important derivations, numerical problems, practice test and assignments will also have uploaded time to time. Class 10 Science Solutions often incorporate diagrams, illustrations, and images to visually explain concepts and enhance understanding. For problems and questions, solutions offer step-by-step explanations, guiding students through the process of solving and understanding. Through holiday homework page you can upload you summer holiday, if need help, we will provide the solutions and suggestions according to requirements. Offline Solutions Apps works without Internet.

How to Perform Better in Class 10 Science Exams?

If you are preparing to compete with the toppers of the class to achieve more than 90% in Science or if you want to pursue your study with the science stream, you must focus upon these three sections of science Physics, Chemistry, and biology. People with the target 100% or A+ achieve, the score with sheer will perseverance and that is what you need to achieve first. Tiwari Academy’s online platform allows students to access study materials at any time and from anywhere with an internet connection. This flexibility can accommodate different learning schedules and preferences. Any student with the average IQ and dedication will be able to achieve 90% but people who want to surpass the 90% threshold and go beyond to achieve 100% in science need to keep in mind that there is not shortcut to the success.

Step 1: Prepare the chapter from NCERT, figuring out the main terms.

Step 2: plan and study according to time table., step 3: prepare the list of formulae, diagrams and experiments., step 4: take help from class 10 science ncert solutions., step 5: keep distance from distractions during the study..

Incorporating scientific thinking and problem-solving skills into the curriculum benefits students in all areas of education and equips them with valuable skills that extend far beyond the confines of the science classroom. These skills are essential for academic success, lifelong learning, and success in various careers and life endeavors. To get good marks in Class 10 Science using Tiwari Academy’s Class 10 Science NCERT Solutions or any similar educational resource, you can follow these steps:

Understand the Syllabus : First, ensure that you have a clear understanding of the Class 10 Science syllabus. Know what topics are covered and the weightage of each chapter in the exam.

Use the NCERT Textbook : Start by thoroughly reading your Class 10 Science NCERT textbook. Understand the concepts and ideas presented in each chapter. Tiwari Academy’s solutions often complement the NCERT textbook, so use them in conjunction.

Solve NCERT Questions : Tiwari Academy typically provides solutions to the questions presented in the NCERT textbook. After reading a chapter, attempt the questions on your own and then refer to Tiwari Academy’s solutions to check your answers and understanding.

Practice Additional Problems : Besides the NCERT questions, Tiwari Academy may offer additional practice problems. Utilize these to further reinforce your understanding of the concepts and improve problem-solving skills.

Focus on Understanding : Don’t just memorize solutions. Focus on understanding the underlying concepts. This will help you answer questions even if they are presented differently in the exam.

Create a Study Schedule : Plan your study schedule in a way that you allocate sufficient time to each chapter according to its weightage in the exam. Make a realistic timetable that includes regular breaks. These notes will be helpful during revision. Tiwari Academy’s solutions can be a valuable source for summarizing important points.

Online Resources : If Tiwari Academy offers video lectures or animations related to Class 10 Science topics, consider using them for better visualization and understanding of complex concepts.

Practice Previous Year Papers : Work through previous years’ question papers and sample papers. Tiwari Academy may also provide these. This will help you become familiar with the exam pattern and the types of questions asked.

Many solutions include real-life examples and applications of scientific principles, helping students relate concepts to their everyday experiences. Solutions include practice questions and exercises that allow students to apply their understanding and practice problem-solving skills.

How to score 100 percent marks in exams of Class 10 Science?

Most of the questions asked in CBSE board exams are from NCERT only. Students are advised to read thoroughly each chapter of NCERT Textbook and try to make a quick note for revision. During the study of chapters, the activity related to topics must be done carefully. Now a days activity based questions are also asked in board exams. Once completed the NCERT book, student must revision the entire class 10 science through NCERT Exemplar book. It will enhance your confidence and help to identify the weak area science syllabus. Following this process, one can score easily 95% to 100% marks in 10th Science board exams.

Which is the most difficult chapter in Class 10 Science final exams?

There are total 13 chapters in Class 10 Science NCERT Textbook. Most of the chapters are easy to understand and help to score well in exams. Out of these chapters, chapter 11 Electricity is considered as the most difficult chapter of the book which is in second term syllabus. There are two reasons for being difficult. First, the chapter is little bit lengthy having too many formulae and concepts of electricity and secondly there are many numerical in the chapter increase the level of difficulty. If a student spend a bit of time regularly on this chapter, the chapter automatically become easy to understand.

Which is the best book for the preparation of Class 10 Science 1st and 2nd term exams?

If you check the question papers of CBSE board exams or CBSE Sample papers, the questions are directly or indirectly asked from NCERT Textbook only. To get a perfect preparation of 10th Science exams, NCERT Book provides the best study material for the students. If someone need more to practice as well as self-evaluation, please refer Exemplar book published by NCERT.

How to download Class 10 Science NCERT book and solutions for CBSE Session 2024-25?

The updated format of 10th Science Solutions for academic session 2024-25 are given on Tiwari Academy website free to use. All the solutions of numerical and answers of questions are done by the expert teachers. Class 10th Science Solutions are made in such a way it can be understood by all categories of students. The answers of grade 10 NCERT Textbook intext questions are also given along with the exercises solutions.

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NCERT Solutions for Class 10 Science Chapter 1 - Chemical Reactions and Equations

• NCERT Solutions
• Chapter 1 Chemical Reactions And Equations

NCERT Class 10 Science Chapter 1 - Chemical Reactions and Equations FREE PDF Download

Vedantu’s NCERT Solutions for Class 10 Chemistry Chapter 1 - Chemical Reactions and Equations solves all the questions in the chapter. This chapter delves into the fascinating world of chemical reactions, helping students understand and master the principles of balancing chemical equations and different types of reactions. Students gain comprehensive insights into these fundamental concepts by accessing the Science Class 10 Chapter 1 PDF. Vedantu provides straightforward and detailed answers, making it easier for students to grasp complex concepts and processes in chemical reactions.

Download our NCERT Solutions for Class 10 Science Chapter 1 - Chemical Reactions And Equations, which is revised based on the Class 10 Science syllabus . Get started with Vedantu’s NCERT Solutions for Chapter 1 to embark on a journey of academic excellence. 

Quick Insights of Chemical Reactions And Equations NCERT Solutions for Class 10 Science

Gain a comprehensive overview of chemical reactions and their significance in everyday life.

Learn the crucial skill of balancing chemical equations, which is fundamental for understanding chemical processes.

Chapter 1 Science Class 10 explores various chemical reactions, including combination, decomposition, displacement, and double displacement reactions.

NCERT Solutions for Class 10 Science Chapter 1 comprehensively covers all questions from the chapter and ensures thorough exam preparation .

Class 10 Science Chapter 1 Question Answer will help to develop proficiency in solving numerical problems related to chemical equations and reactions, enhancing problem-solving skills.

To reinforce learning, Vedantu provides additional resources such as class notes, important concepts, formulas, and exemplar solutions.

Access NCERT Solutions for Class 10 Science Chapter 1: Chemical Reactions and Equations

Intext Exercise 1

1. Why should a magnesium ribbon be cleaned before burning in air?

Ans: Magnesium is a reactive metal. It will react with oxygen and form a white layer of magnesium oxide (MgO) on its surface. Magnesium oxide is a stable compound and will prevent the further reaction of the metal. So, a magnesium ribbon is cleaned before burning in air to remove the layer of magnesium oxide from its surface.

2. Write the balanced equation for the following chemical reactions.

i) Hydrogen + Chlorine $\to $ Hydrogen chloride

Ans: A balanced equation consists of the same number of moles on the reactants and the products side. The balanced equation for the given reaction is:${{H}_{2(g)}}+C{{l}_{2(g)}}\to 2HC{{l}_{(g)}}$

ii) Barium chloride + Aluminium sulphate $\to $ Barium sulphate + Aluminium chloride

Ans: A balanced equation consists of the same number of moles on the reactants and the products side. The balanced equation for the given reaction is:$3BaC{{l}_{2(s)}}+A{{l}_{2}}{{(S{{O}_{4}})}_{3(s)}}\to 3BaS{{O}_{4(s)}}+2AlC{{l}_{3(s)}}$

iii) Sodium + Water $\to $ Sodium hydroxide + Hydrogen 

A balanced equation consists of the same number of moles on the reactants and the products side. The balanced equations for the given reaction is $2N{{a}_{(s)}}+2{{H}_{2}}{{O}_{(l)}}\to 2NaO{{H}_{(aq)}}+{{H}_{2}}_{(g)}$ 

3. Write a balanced chemical equation with state symbols for the following reactions.

i) Solutions of barium chloride and sodium sulphate in water react to give insoluble barium sulphate and the solution of sodium chloride.

Ans: A balanced chemical equation has the same number of moles of reactants and products. The balanced chemical equation is:$BaC{{l}_{2(aq)}}+N{{a}_{2}}S{{O}_{4(aq)}}\to BaS{{O}_{4(s)}}+2NaC{{l}_{(aq)}}$ 

ii) Sodium hydroxide solution (in water) reacts with hydrochloric acid solution (in water) to produce sodium chloride solution and water.

Ans: A balanced chemical equation has the same number of moles of reactants and products. The balanced chemical equation is:$NaO{{H}_{(aq)}}+HC{{l}_{(aq)}}\to NaC{{l}_{(aq)}}+{{H}_{2}}{{O}_{(l)}}$ 

Intext Exercise 2

1. A solution of a substance 'X ' is used for white washing.

i) Name the substance 'X' and write its formula.

Ans: Substance ‘X’ is calcium oxide also known as quicklime that is used in white washing. Its chemical formula is CaO.

ii) Write the reaction of the substance 'X' named in (i) above with water. 

Ans: Calcium oxide reacts with water in a combination reaction to from calcium hydroxide also called slaked lime, the reaction is:

$Ca{{O}_{(s)}}+{{H}_{2}}{{O}_{(l)}}\to Ca{{(OH)}_{2(aq)}}$ 

2. Why is the amount of gas collected in one of the test tubes in Activity 1.7 double of the amount collected in the other? Name this gas. 

Water consists of hydrogen and oxygen atoms. It is a combination of two hydrogen and one oxygen atom. In electrolysis, hydrogen moves towards the cathode and oxygen towards the anode. So, the ratio of hydrogen and oxygen is 2:1. And hydrogen is double the amount of oxygen. 

$2{{H}_{2}}O\to 2{{H}_{2}}+{{O}_{2}}$ 

Intext Exercise 3

1. Why does the color of copper sulphate solution change when an iron nail is dipped in it?

When an iron nail is dipped in a solution of copper sulphate, then the more reactive metal displaces the less reactive metal. As a result the blue solution of copper sulphate gets faded and forms a green compound known as ferrous sulphate.

\[\underset{\text{Iron}}{\mathop{F{{e}_{(s)}}}}\,+\underset{\begin{smallmatrix}\text{ Copper sulphate } \\ (\text{Blue}) \end{smallmatrix}}{\mathop{CuS{{O}_{4(aq)}}}}\,\to \underset{\text{Ferrous sulphate}}{\mathop{FeS{{O}_{4(aq)}}}}\,+\underset{\begin{smallmatrix} \text {Copper} \\ (\text{Green}) \end{smallmatrix}}{\mathop{C{{u}_{(s)}}}}\,\]  

2. Give an example of a double displacement reaction other than the one given in Activity 1.10. 

A double displacement reaction consists of two ions replacing each other’s position from the reactants to form new compounds in the products. A double displacement reaction occurs when Potassium iodide reacts with lead nitrate to form lead iodide (yellow precipitate) and potassium nitrate. 

\[2KI+Pb{{(N{{O}_{3}})}_{2}}\to Pb{{I}_{2}}\downarrow +2KN{{O}_{3}}\] 

3. Identify the substances that are oxidised and the substances that are reduced in the following reactions

i) $\text{4N}{{\text{a}}_{\text{(s)}}}\text{+}{{\text{O}}_{\text{2(g)}}}\to \text{2N}{{\text{a}}_{\text{2}}}{{\text{O}}_{\text{(s)}}}$ 

Ans: Any species is said to be oxidised when it loses electrons and increases the oxidation state, while any species is said to be reduced when it gains electrons and decreases the oxidation state. Sodium (Na) is oxidised and oxygen gets reduced.

\[4\text{Na}+{{\text{O}}_{2}}\to 2\text{N}{{\text{a}}_{2}}\text{O}\] 

ii) $\text{Cu}{{\text{O}}_{\text{(s)}}}\text{+}{{\text{H}}_{\text{2(g)}}}\to \text{Cu(s)+}{{\text{H}}_{\text{2}}}{{\text{O}}_{\text{(l)}}}$ 

Ans: Any species is said to be oxidised when it loses electrons and increases the oxidation state, while any species is said to be reduced when it gains electrons and decreases the oxidation state. Copper oxide (CuO) is reduced to copper (Cu) as it loses oxygen and hydrogen $\left( {{H}_{2}} \right)$is oxidized to water $({{H}_{2}}O)$ 

    \[CuO+{{H}_{2}}\xrightarrow{\Delta }Cu+{{H}_{2}}O\]  

NCERT exercises

1. Which of the statements about the reaction below are incorrect?

$\text{2Pb}{{\text{O}}_{\text{(s)}}}\text{+}{{\text{C}}_{\text{(s)}}}\to \text{2P}{{\text{b}}_{\text{(s)}}}\text{+C}{{\text{O}}_{\text{2(g)}}}$ 

a. Lead is getting reduced.

b. Carbon dioxide is getting oxidised.

c. Carbon is getting oxidised.

d. Lead oxide is getting reduced. 

i) (a) and (b)

ii) (a) and (c) 

iii) (a),(b) and (c)

Incorrect option is (i) (a) and (b)

Explanation :

(a) Oxygen is being removed

(b) The Oxygen removed from lead is transferred to the elemental Carbon.

2. $\text{F}{{\text{e}}_{\text{2}}}{{\text{O}}_{\text{3}}}\text{+2Al}\to \text{A}{{\text{l}}_{\text{2}}}{{\text{O}}_{\text{3}}}\text{+2Fe}$ 

The above reaction is an example of a _______________

 Options:

a) Combination reaction.

b) Double displacement reaction.

c) Decomposition reaction.

d) Displacement reaction.

  Ans:

(d) The given reaction is an example of a single displacement reaction.

Explanation : The oxygen from ferrous oxide is transferred to aluminum metal, forming aluminum oxide. In this reaction, aluminum, being more reactive than iron, displaces iron from its oxide. This process is known as a displacement reaction, where a more reactive element replaces a less reactive one.

3. What happens when dilute hydrochloric acid is added to iron filings? Tick the correct answer.

a. Hydrogen gas and iron chloride are produced.

b. Chlorine gas and iron hydroxide are produced.

c. No reaction takes place,

d. Iron salt and water are produced. 

(a) Hydrogen gas and iron chloride are produced. The reaction is as follows:

\[F{{e}_{(s)}}+2HC{{l}_{(aq)}}\to FeC{{l}_{2(aq)}}+{{H}_{2}}\uparrow \] 

4. What is a balanced chemical equation? Why should chemical equations be balanced? 

A balanced chemical equation consists of the equal number of moles of the elements in the reactants and that in the products.

Chemical equations should be balanced, as according to the law of conservation of mass, mass can neither be created nor can be destroyed. Therefore, in a chemical reaction, the total mass of reactant should be equal to the total mass of products. Hence, a balanced chemical equation has total mass of reactants equal to total mass of products.

5. Translate the following statements into chemical equations and then balance them.

a) Hydrogen gas combines with nitrogen to form ammonia.

Ans: $3{{H}_{2(g)}}+{{N}_{2(g)}}\to 2N{{H}_{3(g)}}$

b) Hydrogen sulphide gas burns in air to give water and sulphur dioxide.

Ans: $2{{H}_{2}}{{S}_{(g)}}+3{{O}_{2(g)}}\to 2{{H}_{2}}{{O}_{(l)}}+2S{{O}_{2(g)}}$

c) Barium chloride reacts with aluminium sulphate to give aluminium chloride and a precipitate of barium sulphate.

Ans: $3BaC{{l}_{2(aq)}}+A{{l}_{2}}{{(S{{O}_{4}})}_{3(aq)}}\to 2AlC{{l}_{3(aq)}}+3BaS{{O}_{4(s)}}$

d) Potassium metal reacts with water to give potassium hydroxide and hydrogen gas 

Ans: $2{{K}_{(s)}}+2{{H}_{2}}{{O}_{(l)}}\to 2KO{{H}_{(aq)}}+{{H}_{2(g)}}$

6. Balance the following chemical equations

a)$\text{HN}{{\text{O}}_{3}}+\text{Ca}{{(\text{OH})}_{2}}\to \text{Ca}{{\left( \text{N}{{\text{O}}_{3}} \right)}_{2}}+{{\text{H}}_{2}}\text{O}$ 

Ans: $2HN{{O}_{3}}+Ca{{(OH)}_{2}}\to Ca{{\left( N{{O}_{3}} \right)}_{2}}+2{{H}_{2}}O$

b)$\text{NaOH}+{{\text{H}}_{2}}\text{S}{{\text{O}}_{4}}\to \text{N}{{\text{a}}_{2}}\text{S}{{\text{O}}_{4}}+{{\text{H}}_{2}}\text{O}$ 

Ans: $2NaOH+{{H}_{2}}S{{O}_{4}}\to N{{a}_{2}}S{{O}_{4}}+2{{H}_{2}}O$

c)$\text{NaCl}+\text{AgN}{{\text{O}}_{3}}\to \text{AgCl}+\text{NaN}{{\text{O}}_{3}}$ 

Ans: \[NaCl+AgN{{O}_{3}}\to AgCl+NaN{{O}_{3}}\]

d)$\text{BaC}{{\text{l}}_{\text{2}}}\text{+}{{\text{H}}_{\text{2}}}\text{S}{{\text{O}}_{\text{4}}}\to \text{BaS}{{\text{O}}_{\text{4}}}\text{+HCl}$ 

Ans: $BaC{{l}_{2}}+{{H}_{2}}S{{O}_{4}}\to BaS{{O}_{4}}+2HCl$

7. Write the balanced chemical equations for the following reactions.

a) Calcium hydroxide + Carbon dioxide $\to $ Calcium carbonate + Water

Ans: $Ca{{(OH)}_{2}}+C{{O}_{2}}\to CaC{{O}_{3}}+{{H}_{2}}O $

b) Zinc + Silver nitrate $\to $Zinc nitrate +Silver

Ans: $Zn+2AgN{{O}_{3}}\to Zn{{\left( N{{O}_{3}} \right)}_{2}}+2Ag$

c) Aluminium + Copper chloride $\to $Aluminium chloride + Copper

Ans: $2Al+3CuC{{l}_{2}}\to 2AlC{{l}_{3}}+3Cu$

d) Barium chloride + Potassium sulphate$\to $Barium sulphate + Potassium chloride

Ans: $BaC{{l}_{2}}+{{K}_{2}}S{{O}_{4}}\to BaS{{O}_{4}}+2KCl$ 

8. Write the balanced chemical equation for the following and identify the type of reaction in each case.

a) Potassium bromide (aq) + Barium iodide (aq) $\to $Potassium iodide (aq) + Barium bromide(s)

Ans: $2KB{{r}_{(aq)}}+Ba{{I}_{2(aq)}}\to 2K{{I}_{(aq)}}+BaB{{r}_{2(aq)}}$ ; Double displacement reaction

b) Zinc carbonate (s) $\to $Zinc oxide (s) + Carbon dioxide (g)

Ans: $ZnC{{O}_{3(s)}}\to Zn{{O}_{(s)}}+C{{O}_{2(g)}}$ ; Decomposition reaction

c) Hydrogen (g)+ Chlorine (g)$\to $Hydrogen chloride (g)

Ans: ${{H}_{2(g)}}+C{{l}_{2(g)}}\to 2HC{{l}_{(g)}}$ ; Combination reaction

d) Magnesium (s) + Hydrochloric acid (aq) $\to $Magnesium chloride (aq) + Hydrogen (g) 

Ans: $M{{g}_{(s)}}+2HC{{l}_{(aq)}}\to MgC{{l}_{2}}_{(aq)}+{{H}_{2}}_{(g)}$ ; Single displacement reaction

9. What does one mean by exothermic and endothermic reactions? Give examples.  

Exothermic Reaction: The reactions in which heat is evolved along with the formation of new products are called exothermic reactions. In these reactions the energy of the reactants is more than that of the products, so energy is released to complete the reaction.

Energy of reactants > Energy of products

Example : Complete combustion of methane gas produces carbon dioxide and water along with heat and light.

\[C{{H}_{4}}(~g)+2{{O}_{2}}(~g)\to C{{O}_{2}}+2{{H}_{2}}O+heat+light\]

Another example of exothermic reactions is respiration and decomposition of vegetable matter.

Endothermic Reaction: The reactions in which energy is absorbed by the reactants to carry on the reaction are called endothermic reactions. In this type of reaction, the energy of the reactants is less than that of the products, so energy is needed and absorbed.

Energy of reactants <Energy of products

Example : Process of Photosynthesis, where plants absorb sunlight in the presence of carbon dioxide and water and make their food in the form of glucose and release oxygen.

\[6C{{O}_{2(g)}}+6{{H}_{2}}{{O}_{(l)}}\xrightarrow{sunlight}{{C}_{6}}{{H}_{12}}{{O}_{4(aq)\text{ }}}+6{{O}_{2(g)}}\] 

10. Why is respiration considered an exothermic reaction? Explain. 

Exothermic reactions are the reactions in which heat is going to be released. These reactions result in the formation of energy as the energy of reactants is greater than that of products. Respiration is the process in which the glucose from our body combines with oxygen in the cells to provide us with energy. The glucose is broken down through the process of digestion that along with oxygen provides us with energy and hence respiration is an exothermic reaction. The reaction that happens is as follows:

\[{{C}_{6}}{{H}_{12}}{{O}_{6(aq)}}+6{{O}_{2(g)}}\to 6C{{O}_{2(g)}}+6{{H}_{2}}{{O}_{(l)}}+energy\] 

11. Why are decomposition reactions called the opposite of combination reactions? Write equations for these reactions. 

A decomposition reaction consists of a single reactant that breaks down into two or more simpler products.

Example : Decomposition of calcium carbonate to give calcium oxide and carbon dioxide as,

\[CaC{{O}_{3}}+\text{ }Energy\text{ }\to CaO+C{{O}_{2}}\]

A combination reaction consists of two reactants that combine or mix together to form a single product.

Example : Combination of Calcium oxide and carbon dioxide to form one single product calcium carbonate

\[CaO+C{{O}_{2}}\to CaC{{O}_{3}}+\text{ }energy\text{ }\]

Hence, decomposition reactions are the opposite of combination reactions.

12. Write one equation each for decomposition reactions where energy is supplied in the form of heat, light or electricity.

Decomposition reactions are the reactions where a reactant breaks down into two or more products.

a) Decomposition by heat:

Ferrous sulphate decomposes to give ferrous oxide, sulphur dioxide and sulphur trioxide as,

\[2FeS{{O}_{4(s)}}\xrightarrow{\Delta }F{{e}_{2}}{{O}_{3(s)}}+S{{O}_{2(g)}}+S{{O}_{3(g)}}\]

b) Decomposition by light:

Silver chloride decomposes in light to form silver and chlorine as,

\[2AgC{{l}_{(s)}}\xrightarrow{Light}2A{{g}_{(s)}}+C{{l}_{2(g)}}\]

c) Decomposition by electricity:

Water decomposes in presence of electricity to form hydrogen and oxygen gases as,

\[2{{H}_{2}}O\xrightarrow{Electricity}2{{H}_{2}}+{{O}_{2}}\]

13. What is the difference between displacement and double displacement reactions? Write equations for these reactions.

A displacement reaction is a reaction in which a more reactive element displaces a less reactive element from its compound. The elements at the top in the activity series can replace the elements at the bottom. 

Example : Zinc is more reactive than copper and replaces copper from copper sulphate as:

\[CuS{{O}_{4(aq)}}+Z{{n}_{(s)}}\to ZnS{{O}_{4(aq)}}+C{{u}_{(s)}}\]

Double displacement reaction is the type of reaction where two compounds react in the way that there is exchange of positive and negative ions and new compounds are formed as products.

Example : On mixing sodium sulphate solution with barium chloride solution, a white precipitate of barium sulphate is formed as:

\[N{{a}_{2}}S{{O}_{4(aq)}}+BaC{{l}_{2(aq)}}\to BaS{{O}_{4(s)}}+2NaC{{l}_{(aq)}}\] 

14. In the refining of silver, the recovery of silver from silver nitrate solution involved displacement by copper metal. Write down the reaction involved. 

The equation of recovery of silver from silver nitrate solution in silver refining is as follows:

\[2AgN{{O}_{3(aq)}}+C{{u}_{(s)}}\to Cu{{(N{{O}_{3}})}_{2(aq)}}+2A{{g}_{(s)}}\]

Here displacement of silver by copper happens as copper is more reactive than silver.

15. What do you mean by a precipitation reaction? Explain by giving examples. 

The type of reaction where an insoluble substance called a precipitate is formed when there is exchange of ions between the reactants is called a precipitation reaction.

Example 1 : On mixing sodium carbonate solution with calcium chloride solution, a white precipitate of calcium carbonate is formed.

\[N{{a}_{2}}C{{O}_{3(aq)}}+CaC{{l}_{2(aq)}}\to CaC{{O}_{3(s)}}\downarrow +2NaC{{l}_{(aq)}}\]

Example 2 : On mixing sodium sulphate solution with barium chloride solution, a white precipitate of barium sulphate is formed.

\[N{{a}_{2}}S{{O}_{4(aq)}}+BaC{{l}_{2(aq)}}\to BaS{{O}_{4(s)}}\downarrow +2NaC{{l}_{(aq)}}\]

16. Explain the following in terms of gain or loss of oxygen with two examples each.

a) Oxidation

Ans: Oxidation:  A type of reaction in which oxygen or an electronegative species is added to a substance or there is removal of hydrogen or a positive species from a substance is called oxidation.

For Example :

$C{{O}_{2}}+{{H}_{2}}\to CO+{{H}_{2}}O$ (Addition of oxygen to${{H}_{2}}$)

$2Cu+{{O}_{2}}\to 2CuO$ (Addition of oxygen to Cu)

b) Reduction 

Ans: Reduction: A type of reaction in which hydrogen or an electropositive species is added to a substance or oxygen or an electronegative species is removed, is called reduction.

$C{{O}_{2}}+{{H}_{2}}\to CO+{{H}_{2}}O$ (Oxygen is removed from$C{{O}_{2}}$)

$CuO+{{H}_{2}}\xrightarrow{\Delta }Cu+{{H}_{2}}O$ (Oxygen is removed from CuO)

17. A shiny brown-coloured element ‘X’ on heating in air becomes black in colour. Name the element ‘X’ and the black-coloured compound formed.

Copper (Cu) is ‘X’ and the black colour compound is copper (II) oxide (CuO). Copper reacts with oxygen to form a black colour compound called copper (II) oxide as: 

\[2Cu+{{O}_{2}}\to 2CuO\] 

18. Why do we apply paint on iron articles?

Iron is a reactive metal and can react with moisture and air. Iron articles, if exposed for a long time in moisture or air, can get corroded and form rust. So, paint is applied on iron articles to prevent rusting and form a protective layer for exposure to air and moisture.

19. Oil and fat containing food items are flushed with nitrogen. Why?

Oils and fat containing items are perishable and can be spoiled when exposed to oxygen. This is because oil and fats are reactive and can react with oxygen easily and get oxidised. To prevent oxidation, these items are flushed with nitrogen gas. Nitrogen is an inert gas and cannot react with oils or fats easily. So, food items with oils and fats are kept in packets having nitrogen gas that increases the shelf life and makes these items last for a long time.

20. Explain the following terms with one example each.

a) Corrosion

Ans: Corrosion: Corrosion is defined as a process where a substance, generally metal deteriorates and forms a layer of oxide on its surface. Metals get converted into their hydrated oxides or sulphides. Ex; Iron, Cu, Ag

\[4Fe+3{{O}_{2}}+n{{H}_{2}}O\to \underset{Hydrated\,iron\,oxide}{\mathop{2F{{e}_{2}}{{O}_{3}}.n{{H}_{2}}O}}\,$\]

\[2Ag+{{H}_{2}}~S\to A{{g}_{2}}~S+{{H}_{2}}\] 

b) Rancidity

Ans: Rancidity: It is a process in which food items like fats and oils are oxidised. This results in the change in taste and smell of the food item and is called rancidity. For example, when any fried food is exposed to air for a long time then it has a change in smell and taste and it becomes rancid.

Rancidity can be avoided by:

Adding antioxidants like BHA (Butylated tri hydroxy anisole)

Refrigerate the food items

keep food items in airtight containers

Adding nitrogen to food packets to prevent oxidation.

Science Chapter 1 Class 10 - Quick Overview on Chemical Reaction and Equations

Important Concepts Covered in Class 10 Science Chapter 1

Ch 1 Science Class 10 covers the following concepts which are very important from an exam point of view:

Types of Chemical Reactions:

Combination Reactions : Reactions where two or more substances combine to form a single product.

Decomposition Reactions : Reactions where a single compound breaks down into two or more simpler substances.

Displacement Reactions : Reactions where an element displaces another element from its compound. This includes:

Single Displacement Reactions : A more reactive element displaces a less reactive element from its compound.

Double Displacement Reactions : The ions of two compounds exchange places in an aqueous solution to form two new compounds.

Oxidation and Reduction Reactions : Understanding redox reactions, where oxidation involves electrons' loss and reduction involves electrons' gain.

Corrosion and Rancidity : Learning about the chemical processes involved in the corrosion of metals and rancidity of food, and methods to prevent them.

Benefits Referring NCERT Solutions for Class 10 Science Chapter 1 Chemical Reactions and Equations

Below are some of the benefits of Chapter 1 of Class 10 Science NCERT Solutions.

Students will get a clear idea of balancing various types of equations.

Chapter 1 Science Class 10   solutions make it easier for the students to formulate chemical equations.

To get more insights on Ch 1 Chemistry Class 10, Vedantu provides many practice questions of varying difficulty levels so that board examinations may be taken without worry.

Every question from ch 1 chemistry class 10 is explained in a step-by-step manner and these solutions are provided keeping in mind CBSE patterns.

Related Study Materials for Chemical Reaction and Equation Class 10

Students can also download additional study materials provided by Vedantu for Chemistry Class 10, Chapter 1 –

Class 10 Science Ch 1 , "Chemical Reactions and Equations," solutions are presented straightforwardly, containing all essential details to help students understand chemical reactions and equations. With completely revised solutions and critical points aligned with exam specifications, students can rely on these solutions for effective exam preparation. NCERT Class 10 Science Chapter 1 introduces numerous new concepts, making comprehending challenging. NCERT Solutions for Class 10 Science Chapter 1 are prepared by Vedantu's experts to provide students with an ideal resource for practice, enhancing the learning process and ultimately helping students achieve better exam marks.

Chapter-wise NCERT Solutions Class 10 Science

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FAQs on NCERT Solutions for Class 10 Science Chapter 1 - Chemical Reactions and Equations

1. Before burning a magnesium ribbon in the air, why should it be cleaned

Magnesium ribbon must be cleaned before burning in the air, so as to remove the layer of MgO formed due to the reaction between magnesium and air. 

2. Why not immediately a wall acquires a white colour when a coating of slaked lime is applied to it?

When a solution of slaked lime is applied on the wall, CO 2 gas present in the air slowly reacts with a thin layer of calcium hydroxide to form a thin layer of calcium carbonate, that is quite white. Therefore, the newly formed calcium carbonate impart a white look to the walls. 

Ca(OH) 2 (aq) + CO 2 (g) →  CaCO 3 (s) + H 2 O (l)

3. Consider the following reaction:

2FeSO 4 (s) → Fe 2 O 3 (s) + SO 2 (g) + SO 3 (g)

Is it a redox reaction or not? If yes, why?

It is a redox reaction because ferrous (Fe 3+ ) whereas SO 2- 4 is getting reduced to SO 2 .

4. Identify the oxidizing agent in the following equation.

MnO 2 (s) + 4HCL à MnCl 2 (aq) + Cl 2 (g) + 2H 2 O

MnO 2 is the oxidizing agent in the equation.

5. Why should students refer to NCERT Solutions provided by Vedantu?

NCERT Solutions provided by Vedantu is very comprehensive and developed in a step-by-step method that makes it self-explanatory. After extensive research and as per the latest syllabus and guidelines of NCERT, our subject-matter experts have designed the notes and the solutions for you to give a better understanding of the concept and they are easily accessible on the Vedantu’s official website. Our experienced teachers are available to clear all your doubts and strengthen your conceptual understanding. Students have shown drastic improvement in their overall performance by the solutions and the reference notes provided by Vedantu.

6. What is the chemical reaction and equations?

A chemical reaction is a process in which one or more substances react with one another and form a different substance known as a product. The product will usually have different physical and chemical properties compared to the reactants. An equation is a symbolic representation of this reaction using formulae, where reactants are on the left hand side and products on the right hand side.

7. What is a balanced chemical equation? Why should chemical equations be balanced?

A chemical equation is a symbolic representation of the entire chemical reaction. It consists of a left-hand side with all the reactants and a right hand side with the products. According to the law of conservation of mass, atoms can neither be created nor destroyed. To follow this universal law, the equation should be balanced so that the total atoms on the left side are equal to the atoms on the right side.

8. What is Chapter 1 of Class 10 Science?

Chapter 1 of NCERT Class 10 Science is Chemical Reactions and Equations. This is one of the basic chapters which is of great importance for building the foundation of Chemistry. It discusses important concepts like chemical formulae, equations reactions, writing a chemical equation, and balancing of chemical equations. These are very important topics that are covered in this chapter and are explained in depth in NCERT Solutions for Chapter 1 of Class 10  by  Vedantu .

9. List out the topics and subtopics covered in the NCERT Solutions for Chapter 1 of Class 10 Science.

Chapter 1 of Class 10 Science Chemical Reactions and equations is a very important chapter from an exam point of view and also for building up the basics of the subject. Some of the topics covered are:

Chemical reactions and equations

Chemical equations

Writing a chemical equation

Balanced chemical equation

Types of chemical reactions

Combination reaction

Decomposition reaction

Displacement reaction

Double displacement reaction

Oxidation and reduction

Have you observed the effects of oxidation reactions in everyday life?

10. How do solutions provided by Vedantu help in studying Chapter 1 of Class 10 Science?

Class 10 Science forms the building blocks of the basics of Science in Biology, Chemistry and Physics. Many important concepts and theories are covered in it. Therefore it is very important for students to understand these concepts and study the topics with a strong base. Vedantu has solutions for all the  important questions of Chapter 1 of Class 10 Science  explained in a very detailed yet simple manner so that the students can remember them for long. There are plenty of diagrams, graphs, flow charts and bullet point answers making the student’s work very easy. These solutions can be downloaded from the Vedantu app and from the Vedantu website at free of cost.

11. What are the important topics in class 10 ch 1 science?

The important topics in class 10 science ch 1 are as follows:

Chemical Equations

Types of Chemical Reactions

You can clear your concepts on the following topics with Vedantu’s NCERT Class 10 Science Chapter 1 and excel in your exams. Happy Learning with Vedantu!

12. What are some good questions for chemical reactions?

Some of the questions that can be asked from Chemistry Class 10 Chapter 1 are:

NCERT Solutions for Class 10 Science Chapter 1 provides all important questions for the examination.

13. What is important in a chemical reaction and equation?

Effects of Oxidation Reactions on Everyday Life

14. What are four types of chemical reactions according to NCERT Solutions Class 10 Science?

The four types of Chemical Reactions are:

NCERT Solutions for Class 10 Science

Ncert solutions for class 10.

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NCERT Solutions for Class 10 Science Chapter 1 Chemical Reactions and Equations

August 10, 2021 by Veerendra

NCERT Solutions for Class 10 Science Chapter 1 Chemical Reactions and Equations includes all the important topics with detailed explanation that aims to help students to understand the concepts better. Students who are preparing for their Class 10 exams must go through NCERT Solutions for Class 10 Science Chapter 1 Chemical Reactions and Equations. All Chapter 1 – Chemical Reactions and Equations Exercise Questions with Solutions to help you to revise complete Syllabus and Score More marks.

You can also Download NCERT Solution Class 10 science to help you to revise complete Syllabus and score more marks in your examinations.

Students can also find NCERT intext, exercises and back of chapter questions. Also working on Class 10 Science Chapter 1 Chemical Reactions and Equations NCERT Solutions will be most helpful to the students to solve their Homeworks and Assignments on time. Students can also download NCERT Solutions for Class 10 Science Chapter 1 Chemical Reactions and Equations PDF to access them even in offline mode. Not only that, but you will also have access to all the FREE PDFs of study materials and solutions along with absolutely FREE Online Tests to enhance your problem-solving speed.

NCERT Solutions for Class 10 Science Chapter 1 – Chemical Reactions and Equations NCERT Solutions for class 10 Science provided herein are designed by our subject matter experts in a simple and precise manner.

Before getting into the details of  NCERT Solutions For Class 10 Science Chapter 1 Chemical Reactions And Equations, let’s have an overview of a list of topics and subtopics under Class 10 Science Chapter 1 Chemical Reactions And Equations :

• Chemical Reactions And Equations
• Chemical Equations

Types Of Chemical Reactions

• Have You Observed The Effects Of Oxidation Reactions In Everyday Life? Y Life?

Free download NCERT Solutions for Class 10 Science Chapter 1 Chemical Reactions and Equations PDF in Hindi Medium as well as in English Medium for CBSE, Uttarakhand, Bihar, MP Board, Gujarat Board, and UP Board students, who are using NCERT Books based on updated CBSE Syllabus for the session 2019-20.

• रासायनिक अभिक्रियाएँ और समीकरण कक्षा 10 विज्ञान हिंदी में
• Class 10 Chemical Reactions and Equations Mind Map

Chemical Equation

• Oxidation in Everyday Life
• Types of Chemical Reactions

NCERT Solutions for Class 10 Science Chapter 1 Intext Questions

Page Number: 6

Question 1 Why should a magnesium ribbon be cleaned before burning in air ? Answer: Magnesium gets covered with a layer of magnesium oxide when kept in air for a long time. This layer hinders the burning of magnesium. Hence, it is to be cleaned before burning.

Question 2 Write the balanced equation for the following chemical reactions. (i) Hydrogen + Chlorine → Hydrogen chloride (ii) Barium chloride + Aluminium sulphate → Barium sulphate + Aluminium chloride (iii) Sodium + Water → Sodium hydroxide + Hydrogen Answer: (i) H 2 + Cl 2 → 2HCl (ii) 3 BaCl 2 + Al 2 (SO 4 ) 3 → BaSO 4 + 2 AlCl 3 (iii) 2Na + 2H 2 O → 2NaOH + H 2 ↑

Question 3 Write a balanced chemical equation with state symbols for the following reactions : (i) Solutions of barium chloride and sodium sulphate in water react to give insoluble barium sulphate and the solution of sodium chloride. (ii) Sodium hydroxide solution (in water) reacts with hydrochloric acid solution (in water) to produce sodium chloride solution and water. Answer: (i) BaCl 2 (aq) + Na 2 SO 4 (aq) → BaSO 4 (s) + 2NaCl (aq) (ii) NaOH (aq) + HCl(aq) → NaCl(aq) + H 2 O(l)

Page Number: 10

Question 2 Why is the amount of gas collected in one of the test tubes in text book Activity 1.7 (i.e., electrolysis of water) double of the amount collected in the other? Name this gas. [CBSE 2015 (Delhi)] Answer: In Activity 1.7, water is electrolysed to give H 2 gas at one electrode and O 2 gas at the other electrode. 2H 2 O(l) → 2H 2 (g) + O 2 (g) Thus two molecules of water on electrolysis give two molecules of hydrogen gas and one molecule of oxygen gas or in other words the amount of hydrogen gas collected would be double than that of oxygen gas.

Page Number: 13

Question 3 Identify the substances that are oxidised and the substances which are reduced in the following reactions. (i) 4Na(s) + O 2 (g) → 2Na 2 O(s) (ii) CuO (s) + H 2 (g) → Cu (s) + H 2 O(l) Answer: (i) Substances oxidised is Na as it gains oxygen and oxygen is reduced. (ii) Substances reduced is Cu as hydrogen is oxidised as it gains oxygen.

NCERT Solutions for Class 10 Science Chapter 1 Textbook Chapter End Questions

Question 1 Which of the statements about the reaction below are incorrect ? 2 PbO(s) + C(s) → 2Pb (s) + CO 2 (g) (a) Lead is getting reduced. (b) Carbon dioxide is getting oxidised. (c) Carbon is getting oxidised. (d) Lead oxide is getting reduced.

(i) (a) and (b) (ii) (a) and (c) (iii) (a), (b) and (c) (iv) All Answer: (i) (a) and (b)

Question 2 Fe 2 O 3 + 2Al → Al 2 O 3 + 2Fe The above reaction is an example of a (a) combination reaction (b) double displacement reaction (c) decomposition reaction (d) displacement reaction Answer: (d) Displacement reaction.

Question 3 What happens when dilute hydrochloric acid is added to iron filings ? Tick the correct answer : (a) Hydrogen gas and iron chloride are produced. (b) Chlorine gas and iron hydroxide are produced. (c) No reaction takes place. (d) Iron salt and water are produced. Answer: (a) Hydrogen gas and iron chloride are produced.

Question 4 What is a balanced chemical equation ? Why should chemical equations be balanced ? Answer: A balanced chemical equation has an equal number of atoms of different elements in the reactants and products. The chemical equations should be balanced to satisfy the law of conservation of mass.

Question 5 Translate the following statements into chemical equations and then balance them. (a) Hydrogen gas combines with nitrogen to form ammonia. (b) Hydrogen sulphide gas burns in air to give water and sulphur dioxide. (c) Barium chloride reacts with aluminium sulphate to give aluminium chloride and a precipitate of barium sulphate. (d) Potassium metal reacts with water to give potassium hydroxide and hydrogen gas. Answer: (a) 3H 2 (g) + N 2 (g) → 2NH 3 (g) (b) H 2 S (g) + 3O 2 (g) → SO 2 (g) + 2H 2 O(l) (c) 3BaCl 2 (aq) + Al 2 (SO 4 ) 3 (aq) → 2AlCl 3 (aq) + 3BaSO 4 ↓(s) (d) 2K (s) + 2H 2 O (l) → 2KOH (aq) + H 2 (g)

Question 6 Balance the following chemical equations : (a) HNO 3 + Ca (OH) 2 → Ca (NO 3 ) 2 + H 2 O (b) NaOH + H 2 SO 4 → Na 2 SO 4 + H 2 O (c) NaCl + AgNO 3 → AgCl + NaNO 3 (d) BaCl 2 + H 2 SO 4 → BaSO 4 + HCl Answer: (a) 2HNO 3 + Ca(OH) 2 → Ca(NO 3 ) 2 + 2H 2 O (b) 2NaOH + H 2 SO 4 → Na 2 SO 4 + 2H 2 O (c) NaCl + AgNO 3 → AgCl + NaNO 3 (d) BaCl 2 + H 2 SO 4 → BaSO 4 + 2HCl

Question 7 Write the balanced chemical equations for the following reactions : (a) Calcium hydroxide + Carbon dioxide → Calcium carbonate + Water (b) Zinc + Silver nitrate → Zinc nitrate + Silver (c) Aluminium + Copper chloride → Aluminium chloride + Copper (d) Barium chloride + Potassium sulphate → Barium sulphate + Potassium chloride Answer: (a) Ca (OH) 2 + CO 2 → CaCO 3 + H 2 O (b) Zn + 2AgNO 3 → Zn(NO 3 ) 2 + 2 Ag (c) 2Al + 3 CuCl 2 → 2AlCl 3 + 3 Cu (d) BaCl 2 + K 2 SO 4 → BaSO 4 + 2KCl

Question 8 Write the balanced chemical equation for the following and identify the type of reaction in each case : (a) Potassium bromide (aq) + Barium iodide (aq) → Potassium iodide (aq) + Barium (b) Zinc carbonate(s) → Zinc oxide (s) + Carbon dioxide (g) bromide(s) (c) Hydrogen (g) + Chloride (g) → Hydrogen chloride (g) (d) Magnesium (s) + Hydrochloric acid (aq) → Magnesium chloride (aq) + Hydrogen (g) Answer: (a) 2KBr (aq) + Bal 2 (aq) → 2Kl(aq) + BaBr 2 (s) Type : Double displacement reaction

(b) ZnCO 3 (s) → ZnO (s) + CO 2 (g) Type : Decomposition reaction

(c) H 2 (g) + Cl 2 (g) → 2HCl(g) Type : Combination reaction

(d) Mg (s) + 2HCl (aq) → MgCl 2 (aq) + H 2 (g) Type : Displacement reaction

Question 9 What does one mean by exothermic and endothermic reactions ? Give examples. Answer: Exothermic reactions : Those reactions in which heat is evolved are known as exothermic reactions. An exothermic reaction is indicated by writing “+ Heat”on the products side of an equation. Example : (i) C (s) + O 2 (g) → CO 2 (g) + Heat (ii) N 2 (g) + 3H 2 (g) → 2NH3 (g) + Heat

Endothermic reactions : Those reactions in which heat is absorbed are known as endothermic reactions. An endothermic reaction is usually indicated by writing “Heat” on the product side of a chemical equation. Examples : (i) C (s) + 2S (s) → CS 2 (l) – Heat (ii) N 2 (g) + O 2 (g) → 2NO(g) – Heat

Question 13 What is the difference between displacement and double displacement reactions? Write equations for these reactions. Answer: In displacement reactions, a more reactive metal displaces a less reactive metal from its solution. For example, Fe(s) + CuSO 4 (aq) → Cu(s) + FeSO 4 (aq) This is a displacement reaction where iron displaces copper from its solution. In double displacement reactions, two reactants in solution exchange their ions. For example, AgNO 3 (aq) + NaCl (aq) → AgCl(s) + NaNO 3 (aq) This is a double displacement reaction where silver nitrate and sodium chloride exchange Cl – and NO 3 – ions between them.

Question 16 Explain the following in terms of gain or loss of oxygen with two examples each: (a) Oxidation and (b) Reduction. Answer: (a) Oxidation : The addition of oxygen to a substance is called oxidation. Example : (i) S(s) + O 2 (g) → SO 2 (g) (Addition of oxygen to sulphur) (ii) 2Mg(s) + O 2 (g) → 2MgO(s) (Addition of oxygen to magnesium)

(b) Reduction : The removal of oxygen from a substance is called reduction. Example: (i) CuO + H2 \(\underrightarrow { Heat }\) Cu + H 2 O Here, copper oxide is being reduced to copper because oxygen gets removed from copper oxide.

(ii) ZnO + C → Zn + CO Here, zinc oxide is being reduced to zinc because oxygen gets removed from zinc oxide.

Question 18 Why do we apply paint on iron articles ? Answer: Paint does not allow iron articles to come in contact with air, water and saves iron articles from damage due to rusting.

Question 19 Oil and fat containing food items are flushed with nitrogen. Why ? Answer: To keep food items fresh and save from getting oxidised, food items are flushed with nitrogen.

(b) Rancidity : The condition produced by aerial oxidation of fats and oils in foods marked by unpleasant smell and taste is called rancidity. Rancidity spoils the food materials prepared in fats and oils which have been kept for a considerable time and makes them unfit for eating. Rancidity can be prevented by adding anti-oxidants to foods containing fats and oils. It can also be prevented by flushing fat and oil containing foods with nitrogen before sealing.

NCERT Solutions for Class 10 Science (Chemistry) Chapter 1 Chemical Reactions and Equations are part of NCERT Solutions for Class 10 Science. Here we have given Class 10 Science NCERT Solutions Chapter 1.

Question 3 What happens when dilute hydrochloric acid is added to iron fillings? Tick the correct answer. a. Hydrogen gas and iron chloride are produced b. Chlorine gas and iron hydroxide are produced c. No reaction takes place d Iron salt and water are produced Solution: Hydrogen gas and iron chloride are produced

Download NCERT Solutions for Class 10 Science Chapter 1 Chemical Reactions and Equations PDF

Question 4 What is a balanced chemical equation? Why should chemical equations be balanced? Solution: An equation for a chemical reaction is an equation in which the number of atoms for each element in the reaction and the total charge is the same for both the reactants and the products. In other words, the mass and the charge are balanced on both sides of the reaction.

Question 5 Translate the following statements into chemical equations and then balance them. a. Hydrogen gas combines with nitrogen to form ammonia b. Hydrogen sulfide gas burns in air to give water and sulfur dioxide c. Barium chloride reacts with Aluminium sulfate to give Aluminium chloride and a precipitate of barium sulphate d. Potassium metal reacts with water to give a potassium hydroxide and hydrogen gas Solution: a. 3H 2 + N 2 → 2NH 3 b. 2H 2 S + 3O 2 → 2H 2 O + 2SO 2 c. 3BaCl 2 + Al 2 (SO 4 ) 3 → 2AlCl 3 + 3BaSO 4 d. 2K + 2H 2 O → 2KOH + H 2

Question 6 Balance the following chemical equations. a. HNO 3 + Ca(OH) 2 → Ca(NO 3 ) 2 + H 2 O b.NaOH + H 2 SO 4 → Na 2 SO 4 + H 2 O C. NaCl + AgNO 3 → AgCl + NaNO 3 d. BaCl 2 + H 2 SO 4 → BaSO 4 + HCl Solution: a. 2HNO 3 + 2Ca(OH) 2 → Ca(NO 3 ) 2 + 2H 2 O b. 6NaOH + 3H 2 SO 4 → 3Na 2 SO 4 + 6H 2 O C. NaCl + AgNO 3 → AgCI + NaNO 3 d. BaCl 2 + H 2 SO 4 → BaSO 4 + 2HCl

Question 7 Write the balanced chemical equations for the following reactions: (a) Calcium hydroxide + Carbon dioxide → Calcium carbonate + Water(b) Zinc + Silver nitrate → Zinc nitrate + Silver(c) Aluminium + Copper chloride → Aluminium chloride + Copper(d) Barium chloride + Potassium sulphate → Barium sulphate + Potassium chlorideAnswer:(a) Ca (OH)2 + CO2 → CaCO3 + H2O(b) Zn + 2AgNO3 → Zn(NO3)2 + 2 Ag(c) 2Al + 3 CuCl2 → 2AlCl3 + 3 Cu(d) BaCl2 + K2SO4 → BaSO4 + 2KCl

Question 9 What is meant by exothermic and endothermic reactions? Give examples. Solution: An exothermic reaction is one that releases heat. If 1 mole of N 2 molecule reacts with 1 mole of O 2 molecule, the heat of 184 KJ has to be supplied to initiate the reaction to give 1 mole of NO molecule. This means that the bonds between N – N and O – O are so strong that they do not break easily. N 2 has triple covalent bond between the two N atoms. O 2 has a double covalent bond. Thus energy has to be put into the reaction to break the strong bonds. Thus the above reaction is a good example of an endothermic reaction.

Question 10 Why is respiration considered an exothermic reaction? Solution: During respiration, glucose combines with oxygen in the cells of our body to form carbon dioxide and water along with the production of energy. Glucose + oxygen → carbon dioxide + water + energy It is an exothermic reaction, because energy is produced during this process.

Question 13 What is the difference between displacement and double displacement reactions? Write relevant equations for the above? Solution: The difference between the displacement and double displacement reactions is that in a displacement reaction one element displaces another by virtue of it being more reactive whereas in a double displacement two anions and two cations switch places between two compounds respectively. For example: CuSO 4 (aq) + Zn(s) → ZnSO 4 + Cu(s) Blue copper sulphate solution reacting with solid zinc will give rise to colourless zinc sulphate solution and solid copper. Thus Zn displaces Cu in the salt form. Zn is more reactive than Cu. An example of double displacement reaction is the reaction between sodium carbonate and calcium chloride, both in aqueous Solution: Na 2 CO 3 (aq) + CaCl 2 (aq) → CaCO 3 (ppt) + 2NaCl(aq)

Question 15 What do you mean by a precipitation reaction? Explain by giving examples: Solution: A precipitation reaction is a reaction in which soluble ions in separate solutions are mixed together to form an insoluble compound that settles out of solution as a solid. This insoluble compound is called a precipitate.

An example of a precipitation reaction Aqueous silver nitrate (AgNO3), when added to a solution containing potassium chloride (KCl), precipitates a white solid, and silver chloride is observed. AgNO 3 (aq) + KCl (aq) → AgCl (s) + KNO 3 (aq) The silver chloride (AgCl) has formed a solid, which is observed as a precipitate.

Question 16 A shiny brown colored element ‘X’ on heating in the air becomes black in color. Name the element ‘X’ and the black coloured compound formed. Solution: The shiny brown colored element X is copper metal (Cu). When copper metal is heated in air, it forms a black colored compound copper oxide. So, the black colored compound is the copper oxide or copper (II) oxide, CuO.

Question 17 Why do we apply paint on iron articles? Solution: Rust is a soft and porous substance, which gradually falls from the surface of an iron object, and then the iron below starts rusting. Thus, rusting of iron (or corrosion of iron) is a continuous process which, if not prevented in time, eats up the whole iron object. So, when we apply paint on iron articles it reduces the rusting of iron.

Question 18 Oil and fat containing food items are flushed with nitrogen. Why? Solution: Packaging fat and oil containing foods in nitrogen gas can prevent rancidity. When the fat and oil present in food materials gets oxidised (in air), their oxidation products have an unpleasant smell and taste. When it is surrounded by unreactive gas, nitrogen, there is no oxygen (of air) to cause its oxidation and make it rancid.

Question 19 Explain the following terms with one example each. a. Corrosion b. Rancidity Solution: a. Corrosion is the process in which metals are eaten up gradually by the action of air, moisture or a chemical on their surface. Corrosion is caused mainly by the oxidation of metals by the oxygen of air. Example: Rusting of iron is the most common form of corrosion. When an iron object is left in damp air for a considerable period of time, it gets covered with a red-brown flaky substance called ‘rust’. This is called rusting of iron. b. The condition produced by aerial oxidation of fat and oil in food which is marked by an unpleasant smell and taste is called rancidity. Example: Rancidity can be retarded by keeping food in a refrigerator. The refrigerator has a low temperature inside it. When the food is kept in a refrigerator, the oxidation of fat and oil in it is slowed down due to low temperature. So, the development of rancidity due to oxidation is retarded.

Question 20 Why should a magnesium ribbon be cleaned before burning in air? Solution: To remove the oxide layer and facilitates rapid burning.

Question 21 Write the balanced equation for the following chemical reactions. i. Hydrogen + Chloride → Hydrogen chloride ii. Barium chloride + Aluminium sulphate → Barium sulphate + Aluminium chloride iii. Sodium + water → Sodium hydroxide + Hydrogen Solution: i. H 2 + Cl 2 → 2HCl ii. 3BaCl 2 + Al 2 (SO 4 ) 3 → 3BaSO 4 + 2AlCl 3 iii. 2Na + 2H 2 O → 2NaOH + H 2

Question 24 Why does the colour of copper sulphate solution change when an iron nail is dipped into it? Solution: In this reaction, iron displaces copper from copper sulphate solution. The deep blue colour of copper sulphate solution fades due to the formation of light green solution of iron sulphate. A red-brown coating of copper metal is formed on the surface of the iron metal. This displacement reaction occurs because iron is more reactive than copper.

Question 25 Identify the substances that are oxidised and the substances that are reduced in the following reactions. i. 4Na(s) + O 2 (g) → 2Na 2 O(s) ii. CuO(s) + H 2 (g) → Cu(s) + H 2 O(l) Solution: i. 4Na(s) + O 2 (g) → 2Na 2 O(s) Here oxygen is added to sodium. The addition of oxygen is Called oxidation. So the substance that is oxidized is sodium Na. ii. CuO(s) + H 2 (g) → Cu(s) + H 2 O(l)

In this reaction, copper oxide (CuO) gives the oxygen required for the oxidation of hydrogen; therefore, copper oxide is the oxidizing agent. Hydrogen is responsible for removing oxygen from copper oxide; therefore, hydrogen is the reducing agent here.

NCERT Solutions for Class 10 Science Chapter 1 (MCQs) [1 Mark each]

Question 4. When a magnesium ribbon is burnt in air, the ash formed is (a) black (b) white (c) yellow (d) pink Answer: (b)When a Mg ribbon is burnt in air, the ash formed is of magnesium oxide which is white in colour. 2Mg(r) + O 2 (g) → 2MgO(f)

Question 5. Three beakers labelled as A, B and C each containing 25 mL of water were taken. A small amount of NaOH, anhyd. CuSO 4 and NaCl were added to the beakers A, B and C, respectively. It was observed that there was an increase in the temperature of the solutions contained in beakers A and B whereas, in case of beaker C, the temperature of the solution falls. Which one of the following statements is/are correct? I. In beakers A and B, exothermic process has occurred. II. In beakers A and B, endothermic process has occurred. III. In beaker C, the exothermic process has occurred. IV. In beaker C, endothermic process has occurred. [NCERT Exemplar] (a) Only I (b) Only II (c) I and IV (d) II and III Answer: (c)As in case of beakers A and B, heat is given out, so temperature became high, hence it is an exothermic reaction while in beaker C, heat is absorbed from water, so temperature falls, hence it is an endothermic process.

Question 7. On immersing an iron nail in CuSO 4 solution for few minutes, you will observe that (a) no reaction takes place (b) the colour of solution fades away (c) the surface of iron nails acquire a black coating (d) the colour of solution changes to green Answer: (b)Fe(s) + CuSO 4  (aq) → FeSO 4  (aq) + Cu(s) Fe is present above in the reactivity series of metals. Hence, Fe displaces Cu from CuSO 4 solution. And the colour of the solution fades away. This is an example of displacement reaction.

Question 10. How the colour changes when the gases after thermal decomposition of ferrous sulphate come in contact with an acidified solution of potassium dichromate? (a) Green to orange (b) Red to colorless (c) Orange to green (d) Blue to green

Answer: (c) The color changes from orange to green due to the formation of iron (III) sulphate

NCERT Solutions for Class 10 Science Chapter 1 Chemical Reactions and Equations (Hindi Medium)

Class 10 Science Chemical Reactions and Equations Mind Map

The representation of chemical reaction by means of symbols of substances in the form of formulae is called chemical equation. For example N 2 + 3H 2 ⇌ 2NH 3

Balanced Chemical Equation

A balanced chemical equation has equal number of atom of each element participating in the reaction on both left and right hand sides of the reaction. According to Law of Conservation of Mass, total mass of the elements present in the products of a chemical reaction has to be equal to the total mass of the element present in the reactants.

Balancing Of A Chemical Equation Total No of Atoms on R.H.S = Total no of Atoms on L.H.S. Fe 3 O 4 T H 2 → Fe + H 2 0 [Fe] Fe 3 O 2 + H 2 → 3Fe + H 2 0 [0] Fe 3 O 4 + H 2 → 3Fe + 4H 2 0 [H] Fe 3 O 4 + 4H 2 → 3Fe + 4H 2 0

Oxidation In Everyday Life

Rusting When iron reacts with oxygen and moisture it forms a red substance called rust.

Corrosion Metals on coming in contact with oxygen, water, acids or gases presents in air changes its surface. This is called corrosion for e.g. black coating on silver and green coating on copper. Prevention – painting, galvanization, oiling, greasing

Rancidity Oil and fats on exposure to air show a change in taste and smell. This property is known as rancidity. Prevention – adding antioxidants, Vacuum packing, refrigeration, flushing food with nitrogen

The transformation of chemical substance into a new chemical substance by making and breaking of bonds between different atom is known a chemical reaction.

Combination Reaction When two elements or one compound and one element or two compounds combine to form a new product. Foi example • H 2 + Cl 2 → 2HCl • Zn + CuS0 4 → ZnS0 4 + Cu • NaOH + H 2 SO 4 → Na 2 SO 4 + H 2 O

Exothermic Reactions Reactions producing energy are called exothermic reactions. Most of the combination reactions are exothermic in nature. For example : CaO + H 2 O → Ca(OH) 2 + Heat

Oxidation Gain of oxygen or removal of hydrogen is called oxidation eg. • Zn + O 2 → ZnO • Mn + HCl → MnCl 2 + H 2

Reduction Gain of hydrogen or removal of oxygen is called reduction. e.g. CuO + H 2 → Cu + H 2 0

Redox Reactions A chemical reaction in which both oxidation and reduction takes place simultaneously are called redox reactions. For example CuO + H 2 → Cu + H 2 O

Displacement Reactions It takes place when a more reactive metal displaces a less reactive metal. For Example: Fe + CuSO 4 → FeSO 4 + Cu

Double Displacement Reactions In this reactions ions are exchanged between two reactants and forming new compounds.

Precipitation Reaction : In some reactions, an insoluble mass is formed which is known as precipitate and such reactions are called precipitation reaction. For Example Na 2 SO 4 + BaCl 2 → 2NaCl + BaSO 4 Precipitate

Features of NCERT Solutions for Class 10 Chapter 1 Science Chemical Reactions and Equations Students can get comprehensive practice of balancing different kinds of equations.

• Find out how to create a balanced chemical equation and learn about chemical reactions with CBSE Class 10 Chemistry learning resources.
• NCERT Solution will help you write different chemical equation appropriately Helps you get thorough practice of solving questions of varied difficulty before facing the main examination.
• Our comprehensive set of study materials acts as a perfect guide when doing homework and preparing for the examination.
• On LearnCBSE.in, our experts support you to understand chemistry with CBSE Class 10 Chemistry such as CBSE Class 10 Chemistry notes, MCQs and NCERT solutions as per the latest syllabus.

With LearnCBSE.in NCERT Solutions Learning App in your Mobile, you will get to attend FREE LIVE Master – Classes and FREE Conceptual videos. Get 100 percent accurate NCERT Book Solution for Class 10 Science Chapter 1 (Chemical Reactions and Equations) explained by expert Science teachers.

Thorough knowledge and good practice will help you score full marks on the questions asked in this chapter.  Learning the fundamentals of Chemistry in CBSE Class 10 is now easy.

Now that you are provided all the necessary information regarding NCERT Solutions for 10 Science Chapter 1 Chemical Reactions and we hope this detailed NCERT Solutions are helpful. Students can also check out NCERT Books, CBSE Syllabus, CBSE Sample Papers, RD Sharma Solutions at LearnCBSE.in for free.

NCERT Solutions for Class 10 Science All Chapters

• Chapter 1 Chemical Reactions and Equations
• Chapter 2 Acids, Bases and Salts
• Chapter 3 Metals and Non-metals
• Chapter 4 Carbon and Its Compounds
• Chapter 5 Periodic Classification of Elements
• Chapter 6 Life Processes
• Chapter 7 Control and Coordination
• Chapter 8 How do Organisms Reproduce?
• Chapter 9 Heredity and Evolution
• Chapter 10 Light Reflection and Refraction
• Chapter 11 Human Eye and Colourful World
• Chapter 12 Electricity
• Chapter 13 Magnetic Effects of Electric Current
• Chapter 14 Sources of Energy
• Chapter 15 Our Environment
• Chapter 16 Management of Natural Resources

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The NCERT Class 10 Science Notes include detailed explanations, along with illustrative examples, solved questions, as well sample questions for students from NCERT books. The CBSE Notes will seemingly help them to get a good grip and a clear insight into all the important concepts. The style and format used are very simple, making it easy for students to retain as well as remember each concept easily for a longer time.

Chapter-wise CBSE Class 10 Science Notes

Class 10 science basically includes some important chapters from the NCERT book, like chemical reactions and equations, electricity, magnetic effects of electric current, acids, bases and salts, control and coordination, reflection and refraction of light, carbon and its compounds, etc. In the table below, we have provided the CBSE Class 10 Science Notes on all these topics. Click on the links below to access the chapter-wise notes of the Class 10 science subject.

The following table has chapters that have been removed from the NCERT Class 10 Science textbook 2023-24. 

To know how to make and use Mind Maps for the Class 10 Science Exam, watch the below video

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Students should evaluate themselves after solving the Sample QPs, and understand their strengths and weaknesses. Improve their weak points by practising more of such questions.

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Students should: 1. Cover all chapters under the syllabus 2. Practise Sample QPs with a marking scheme 3. Revise continuously 4. Understand concepts and try to approach questions with conceptual knowledge

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Class 10 Science Competency Based Questions 2024-25: Download PDF

Class 10 Science Competency Based Questions are available for download here on aglasem.com. These Class 10 Competency Based Questions include MCQs, fill in the blanks, short answer questions, long answer questions, and answer key from the Science curriculum and need you to apply understanding a little beyond the 10th class Science textbook. For CBSE students, understanding and mastering these questions is crucial for success in Science exam. Here you will understand what Competency Based Questions for Science are, how they differ from traditional questions, and get tips on tackling these questions. You can also download Class 10 Competency Based Questions Science PDF .

Class 10 Science Competency Based Questions 2024-25

Here you can access a wide array of CBSE Competency Based Questions for the Science subject. The PDF includes Multiple Choice Questions, Fill in the Blanks, Short Answer Questions, and Long Answer Questions, along with the answer key for class 10 Science. The Competency Based Questions for Class 10 Science can be found here.

Class 10 Science Competency Focused Practice Questions Download Link – Click Here to Download 10 Science CBQ PDF

Class 10 Science Competency Based Questions PDF

The complete pdf for competency focused practice questions for Science is as follows.

What are Science Competency Based Questions?

These are designed to evaluate a student’s understanding of concepts of Science, their ability to apply knowledge in real-life situations, and their critical thinking skills. Unlike traditional questions that may focus on rote learning or memorization, Competency Focused Questions require students to demonstrate a deeper comprehension of the subject matter (Science). These questions measure various competencies in the Science subject, such as problem-solving, logical reasoning, creativity, and subject-specific skills.

For Class 10 Competency Based Questions of Science , students are expected to think beyond the Science textbook and demonstrate their skills in a way that aligns with real-world applications.

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In addition to Science, the Competency Focused Questions for all subjects for students in 10th standard are as follows.

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Class 10 Science Competency Questions  – An Overview

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Competency Based Questions are revolutionizing the way students approach their studies. By focusing on the core competencies required by the CBSE board, students in Class 10 can develop the skills necessary to excel academically and beyond. Whether you are dealing with Class 10 Science Competency Based Questions or any other subject, remember to focus on understanding, application, and critical thinking.

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