Previous Year Question Papers for CBSE Class 10 - All Subjects
Unlock the secret to success with our comprehensive collection of previous year question papers. These papers are your ultimate guide to understanding exam patterns, identifying important topics, and boosting your confidence. Designed to help students of all levels, our resources offer detailed insights into the kind of questions you can expect in the exam. Practice makes perfect, and with these question papers, you’re one step closer to mastering your syllabus and achieving top scores. Start your preparation today and pave your way to academic excellence!
Chapter-Wise Questions for Every Subject
Master each subject with our meticulously organized chapter-wise previous year questions.
Science : Previous Year Chapter-Wise Questions
Dive into the fascinating world of science with our chapter-wise previous year questions. Covering Physics, Chemistry, and Biology, we’ve broken down complex concepts into manageable sections to help you focus your preparation. Each chapter comes with a curated set of questions from past exams, giving you a clear understanding of important topics and frequently asked questions. Whether it’s motion, chemical reactions, or the human body, our resources ensure you’re well-prepared to ace your exams. Start exploring chapter by chapter and make your learning journey smooth and effective!
Chapter 1 : Chemical Reactions and Equations
1 Marks
- How does the flow of acid rain water into a river make the survival of aquatic life in the river difficult?
[CBSE, 2008] - What effect does an increases in concentration of 𝐻+(𝑎𝑞.) in a solution have on the 𝑝𝐻 of solution?
[CBSE, 2009] - During summer season, a milkman usually adds a very small amount of baking soda to fresh milk. Give one reason.
[CBSE Sample Paper 2008] - Dry Hydrogen Chloride gas does not turn blue litmus red whereas Hydrochloric acid does. Give one reason.
[CBSE Sample Paper 2008]
2 Marks :
- Write the chemical formula for washing soda. How may it be obtained from baking soda? Name an industrial use of washing soda other than washing clothes.’
[CBSE, 2008] - I. Name the products formed when sodium hydrogen carbonate is heated.
II. Write the chemical equation for the reaction involved in the above.’
[CBSE, 2009]
3 Marks :
- Baking soda is used in small amount in making bread and cake. It helps to make these soft and spongy. An aqueous solution of baking soda turns red litmus blue. It is also used in soda acid fire extinguisher. Use this information to answer the following questions:
I. How does Baking Soda help to make cakes and bread soft and spongy?
II.How does it help in extinguishing fire?III. is the 𝑝𝐻 value of baking soda solution lesser than or greater than 7?
[CBSE Sample Paper 2008] - Answer the following:
a) Why is Plaster of Paris written as 𝐶𝑎𝑆𝑂4⋅½ 𝐻2𝑂? How is it possible to have half a water molecule attached to 𝐶𝑎𝑆𝑂4?b) Why is Sodium Hydrogen Carbonate an essential ingradiant in antacids.?
c) When electricity is passed through an acquous solution of sodium chloride, three products are obtained. Why is the process called chlor-alkali?
[CBSE Sample Paper 2008] - “𝑝𝐻 has a great importance in our daily life” explain by giving three examples.
ORA compound which is prepared from gypsum has the property of hardening when mixed with a proper quantity of water. Identify the compound and write its chemical formula. Write the chemical equation for its preparation. Mention any one use of the compound.
[CBSE Sample Paper 2017]