- Last modified on:1 monthago
- Reading Time:14Minutes
Home » CBSE Class 10 Science » Assertion Reason Questions for Class 10 Science » Assertion and Reason Questions for Class 10 Science Chapter 1 Chemical Reactions and Equations
![Assertion and Reason Questions for Class 10 Science Chapter 1 Chemical Reactions and Equations - Gurukul of Excellence (1) Assertion and Reason Questions for Class 10 Science Chapter 1 Chemical Reactions and Equations - Gurukul of Excellence (1)](https://i0.wp.com/i0.wp.com/physicsgurukul.com/wp-content/uploads/2022/10/AR-Class-10-Sci-Ch-1.jpg?resize=740%2C444&ssl=1)
Board | CBSE |
---|---|
Useful for | Class 10 Students |
Subject | Science |
Chapter | Chapter 1 Chemical Reactions and Equations |
Question Type | Assertion and Reason Questions |
No. of Questions | 21 |
With Answers | Yes |
Table of Contents
Assertion and Reason Questions for Class 10 Science Chapter 1 Chemical Reactions and Equations
Following questions consist of two statements – Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below:
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.
Q.1. Assertion (A) : Decomposition of vegetable matter into compost is an example of exothermic reactions.
Reason (R) : Exothermic reaction are those reactions in which heat is evolved.
Answer
(a)Q.2. Assertion (A) : When HCl is added to zinc granules, a chemical reaction occurs.
Reason (R) : Evolution of a gas and change in colour indicate that the chemical reaction is taking place.
Answer
(b)Q.3. Assertion (A) : Calcium carbonate when heated gives calcium oxide and water.
Reason (R) : On heating calcium carbonate, decomposition reaction takes place.
Answer
(d)Q.4. Assertion (A) : Brown fumes are produced when lead nitrate is heated.
Reason (R) : Nitrogen dioxide gas is produced as a by product due to the decomposition of lead nitrate.
Answer
(a)Q.5. Assertion (A) : White silver chloride turns grey in sunlight.
Reason (R) : Decomposition of silver chloride in presence of sunlight takes place to form silver metal and chlorine gas.
Answer
(a)Also read: Case Study Questions for Class 10 Science Chapter 1 Chemical Reactions and Equations
Q.6. Assertion (A): Pungent smelling gas is produced when sulphur burns in air.
Reason (R) : Sulphur trioxide is formed on reaction of sulphur with oxygen.
Answer
(c)Q.7. Assertion (A) : In a reaction of copper with oxygen, copper serves as a reducing agent.
Reason (R) : The substance which gains oxygen in a chemical reaction acts as a reducing agent.
Answer
(a)Q.8. Assertion (A) : In electrolysis of water, the volume of hydrogen liberated is twice the volume of oxygen formed.
Reason (R) : Water (H,0) has hydrogen and oxygen in the ratio of 1:2 by volume.
Answer
(c)Q.9. Assertion (A): Corrosion of iron is commonly known as rusting.
Reason (R) : Corrosion of iron occurs in presence of water and air.
Answer
(b)Q.10. Assertion (A) : The balancing of chemical equations is based on law of conservation of mass.
Reason (R) : Total mass of reactants is equal to total mass of products.
Answer
(a)Q.11. Assertion (A): In a balanced chemical equation, total mass of the reactants is equal to the total mass of the products.
Reason (R): Mass can neither be created nor destroyed during a chemical change.
Answer
(a) This is due to the conservation of mass.Q.12. Assertion (A): Iron articles are painted so as to prevent them from rusting.
Reason (R): When the surface of iron is coated with paint, its surface does not come in contact with oxygen and moisture therefore rusting does not take place.
Answer
(a)Also read: Extra Questions for Class 10 Science Chapter 1 Chemical Reactions and Equations
Q.13. Assertion (A) : Chemical reaction changes the physical and chemical state of a substance.
Reason (R) : When electric current is passed through water (liquid), it decomposes to produce hydrogen and
oxygen gases.
Answer
(b)Q.14. Assertion (A): When calcium carbonate is heated, it decomposes to give calcium oxide and carbon dioxide.
Reason (R): The decomposition reaction takes place on application of heat, therefore, it is an endothermic reaction.
Answer
(b) CaCO3 on heating gives CO2 and CaO.Q.15. Assertion (A): Zinc reacts with sulphuric acid to form zinc sulphate and hydrogen gas and it is a displacement reaction.
Reason (R): Zinc reacts with oxygen to form zinc oxide
Answer
(b) Decomposition reaction is a reaction in which a compound breaks down into two or more simpler substances.Q.16. Assertion (A): Chips manufacturers usually Ilush bags of chips with gas such as nitrogen to prevent the chips from getting oxidised.
Reason (R): This increase the taste ot the chips and helps in their digestion.
Answer
(c) Nitrogen being antioxidant prevents the chips from being oxidised.Q.17. Assertion (A): Exposure of silver chloride to sunlight for a long duration turns grey due to the formation of silver by decomposition of silver chloride.
Reason (R): In this process, sublimation of silver chloride takes place.
Answer
(c)Q.18. Assertion (A): Rusting of iron metal is the most common form of corrosion.
Reason (R): The effect of rusting of iron can be reversed if they are left open in sunlight.
Answer
(c)Q.19. Assertion (A): AgBr is used on photographic and X-ray film.
Reason (R): AgBr is photosensitive and changes to Ag and bromine in presence of sunlight and undergoes
decomposition reaction.
Answer
(a) AgBr is a chemical compound. It is widely used in photography as photographic emulsions.Q.20. Assertion (A): Magnesium ribbon keeps on burning in atmosphere of nitrogen.
Reason (R) : Magnesium reacts with nitrogen to form magnesium nitride and this reaction is combination reaction.
Answer
(a)Q.21. Assertion (A): A lead nitrate on thermal decomposition gives lead oxide, brown coloured nitrogen dioxide and oxygen gas.
Reason (R): Lead nitrate reacts with potassium iodide to form yellow ppt. of lead iodide and the reaction is double displacement as well as precipitation reaction.
Answer
(b)Related Posts
Assertion Reason Questions for Class 10 Science Term 2 Exam
Assertion and Reason Questions for Class 10 Science Chapter 15 Our Environment
Assertion and Reason Questions for Class 10 Science Chapter 9 Heredity and Evolution
Assertion and Reason Questions for Class 10 Science Chapter 14 Sources of Energy
Assertion and Reason Questions for Class 10 Science Chapter 13 Magnetic Effects of Electric Current
Assertion and Reason Questions for Class 10 Science Chapter 12 Electricity
Assertion and Reason Questions for Class 10 Science Chapter 11 The Human Eye and Colourful World
Assertion and Reason Questions for Class 10 Science Chapter 10 Light-Reflection and Refraction
Assertion and Reason Questions for Class 10 Science Chapter 8 How Do Organisms Reproduce
Assertion and Reason Questions for Class 10 Science Chapter 7 Control and Coordination
Assertion and Reason Questions for Class 10 Science Chapter 6 Life Processes
Assertion and Reason Questions for Class 10 Science Chapter 5 Periodic Classification of Elements
Assertion and Reason Questions for Class 10 Science Chapter 4 Carbon and Its Compounds
Assertion and Reason Questions for Class 10 Science Chapter 3 Metals and Non metals
Assertion and Reason Questions for Class 10 Science Chapter 2 Acids, Bases and Salts
Frequently Asked Questions (FAQs)
What is the best website for practicing assertion reason questions for class 10 science?
The best website for practicing assertion reason questions for class 10 science is physicsgurukul.com
Are assertion reason questions provided by Physics Gurukul sufficient for exams?
Yes, we have provided many questions in each chapter. So it is sufficient for practice.
What is assertion reason questions in class 10 science?
Assertion reason questions consists of two statements – Assertion and Reason
- Assertion (A):This is a statement that could be a fact, an observation, or a conclusion.
- Reason (R):This explains why the assertion is true (or false).
You need to analyze both statements and determine the relationship between them.
How to answer assertion and reason questions effectively?
Here are some tips for effective answering the assertion and reason questions.
- Read both the Assertion and Reason carefully.
- Think logically about the scientific concept involved.
- Even if the Assertion sounds familiar, analyze it with the Reason provided.
- Don’t be fooled by a partially true Reason.
- Practice with sample questions from your textbook or other resources.
Do Physics Gurukul provides assertion reason questions for all subjects?
Yes, Physics Gurukul provides assertion reason questions for all subjects.
Download CBSE Books
Download CBSE Class 10 Books
Exam Special Series:
- Sample Question Paper for CBSE Class 10 Science (for 2024)
- Sample Question Paper for CBSE Class 10 Maths (for 2024)
- Sample Question Paper for CBSE Class 10 Maths (for 2024)
- CBSE Most Repeated Questions for Class 10 Science Board Exams
- CBSE Important Diagram Based Questions Class 10 Physics Board Exams
- CBSE Important Numericals Class 10 Physics Board Exams
- CBSE Practical Based Questions for Class 10 Science Board Exams
- CBSE Important “Differentiate Between” Based Questions Class 10 Social Science
Download CBSE Class 12 Books
Exam Special Series:
- Sample Question Papers for CBSE Class 12 Physics (for 2024)
- Sample Question Papers for CBSE Class 12 Chemistry (for 2024)
- Sample Question Papers for CBSE Class 12 Maths (for 2024)
- Sample Question Papers for CBSE Class 12 Biology (for 2024)
- CBSE Important Diagrams & Graphs Asked in Board Exams Class 12 Physics
- Master Organic Conversions CBSE Class 12 Chemistry Board Exams
- CBSE Important Numericals Class 12 Physics Board Exams
- CBSE Important Definitions Class 12 Physics Board Exams
- CBSE Important Laws & Principles Class 12 Physics Board Exams
- 10 Years CBSE Class 12 Chemistry Previous Year-Wise Solved Papers (2023-2024)
- 10 Years CBSE Class 12 Physics Previous Year-Wise Solved Papers (2023-2024)
- 10 Years CBSE Class 12 Maths Previous Year-Wise Solved Papers (2023-2024)
- 10 Years CBSE Class 12 Biology Previous Year-Wise Solved Papers (2023-2024)
Download ICSE Class 10 Books
Exam Special Series:
- ICSE Important Numericals Class 10 Physics BOARD Exams (215 Numericals)
- ICSE Important Figure Based Questions Class 10 Physics BOARD Exams (230 Questions)
- ICSE Mole Concept and Stoichiometry Numericals Class 10 Chemistry (65 Numericals)
- ICSE Reasoning Based Questions Class 10 Chemistry BOARD Exams (150 Qs)
- ICSE Important Functions and Locations Based Questions Class 10 Biology
- ICSE Reasoning Based Questions Class 10 Biology BOARD Exams (100 Qs)
Announcements
✨Join our Online JEE Test Series for 499/- Only (Web + App) for 1 Year
Join Now!
✨Join our Online NEET Test Series for 499/- Only for 1 Year
Join Now!
Join Our Telegram Channel
Join our Telegram Channel for Free PDF Download