Assertion Reason Questions class 10 Science Quiz

Assertion Reason Questions for class 10 Science CBSE QUIZ 4

Here is the QUIZ for Assertion Reason Questions for class 10 Science CBSE. This quiz includes Assertion Reason Questions for class 10 Science CBSE from all the chapters mentioned here :

Chemical Reactions and Equations
Acids, Bases, and Salts
Metals and Non-Metals
Carbon and Its Compounds
Life Processes
Control and Coordination
How Do Organisms Reproduce?
Heredity
Light – Reflection and Refraction
The Human Eye and the Colorful World
Electricity
Magnetic Effects of Electric Current
Our Environment

How to Attempt :

Click on the button to start the quiz.
Select the correct option.
After selecting the option you will be guided to the next question.
After finishing the quiz, you will get your score with the correct answers.

GENERAL INSTRUCTIONS

(A) Both Assertion (A) and Reason (R) are true, and Reason (R) is the correct explanation of Assertion (A).
(B) Both Assertion (A) and Reason (R) are true, but Reason (R) is NOT the correct explanation of Assertion (A).
(C) Assertion (A) is true, but Reason (R) is false.
(D) Assertion (A) is false, but Reason (R) is true.

Tips:

Analyze each statement independently before considering their relationship.
Pay attention to logical connections between the Assertion and the Reason.
Use subject knowledge to verify the accuracy of the statements.

Fill this form with correct information.

1 / 25

1. 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 thermal decomposition of lead nitrate.

A is false but R is true

A is true but R is false.

Both A and R are true and R is not the correct explanation of A.

Both A and R are true and R is the correct explanation of A.

2 / 25

2. Assertion (A): A reaction in which two or more substances combine to form a single product is known as a combination reaction.
Reason (R): This reaction always requires oxygen to take place.

A is true but R is false.

A is false but R is true

Both A and R are true and R is the correct explanation of A.

Both A and R are true and R is not the correct explanation of A.

3 / 25

3. Assertion (A): The image formed by a plane mirror is virtual.

Reason (R): A virtual image cannot be obtained on a screen.

A is true but R is false.

A is false but R is true

Both A and R are true and R is not the correct explanation of A.

Both A and R are true and R is the correct explanation of A.

4 / 25

4. Assertion (A): In anaerobic respiration, one of the end products is alcohol.
Reason (R): There is incomplete breakdown of glucose.

Both A and R are true and R is the correct explanation of A.

A is true but R is false.

A is false but R is true

Both A and R are true and R is not the correct explanation of A.

5 / 25

5. Assertion (A): Carbon forms a large number of compounds.

Reason (R): Carbon atoms can form stable covalent bonds with other carbon atoms.

Both A and R are true and R is not the correct explanation of A.

A is false but R is true

A is true but R is false.

Both A and R are true and R is the correct explanation of A.

6 / 25

6. Assertion (A): Following is a balanced equation for the action of steam on iron:
3Fe + 4H2O → Fe3O4 + 4H2
Reason (R): This reaction follows the law of conservation of mass.

Both A and R are true and R is the correct explanation of A.

Both A and R are true and R is not the correct explanation of A.

A is true but R is false.

A is false but R is true

7 / 25

7. Assertion (A): The pH of a neutral solution is 7.

Reason (R): Neutral solutions have equal concentrations of H⁺ and OH⁻ ions.

Both A and R are true and R is the correct explanation of A.

A is false but R is true

A is true but R is false.

Both A and R are true and R is not the correct explanation of A.

8 / 25

8. Assertion (A): Energy is required to carry out different life processes.
Reason (R): Energy is obtained in the form of ATP in the mitochondria.

A is true but R is false.

A is false but R is true

Both A and R are true and R is the correct explanation of A.

Both A and R are true and R is not the correct explanation of A.

9 / 25

9. Assertion (A): Electric current is a scalar quantity.

Reason (R): Electric current has both magnitude and direction.

Both A and R are true and R is not the correct explanation of A.

A is true but R is false.

Both A and R are true and R is the correct explanation of A.

A is false but R is true

10 / 25

10. Assertion (A): Magnetic field lines never intersect each other.

Reason (R): At the point of intersection, there would be two directions of the magnetic field, which is not possible.

Both A and R are true and R is the correct explanation of A.

Both A and R are true and R is not the correct explanation of A.

A is false but R is true

A is true but R is false.

11 / 25

11. Assertion (A): Metals are good conductors of electricity.

Reason (R): Metals have free electrons that can move easily.

A is true but R is false.

Both A and R are true and R is the correct explanation of A.

Both A and R are true and R is not the correct explanation of A.

A is false but R is true

12 / 25

12. Assertion (A): Plants lack excretory organs.
Reason (R): Plants usually absorb essential nutrients.

Both A and R are true and R is the correct explanation of A.

A is true but R is false.

A is false but R is true

Both A and R are true and R is not the correct explanation of A.

13 / 25

13. Assertion (A): Non-metals are generally brittle.

Reason (R): Non-metals have a crystalline structure.

A is true but R is false.

Both A and R are true and R is the correct explanation of A.

Both A and R are true and R is not the correct explanation of A.

A is false but R is true

14 / 25

14. Assertion (A): Zinc can easily displace copper from the solution of copper sulphate.
Reason (R): Copper is more reactive than zinc.

Both A and R are true and R is the correct explanation of A.

Both A and R are true and R is not the correct explanation of A.

A is true but R is false.

A is false but R is true

15 / 25

15. Assertion (A): All proteins in our food are digested in the small intestine only.
Reason (R): The protein-digesting enzymes are released into the small intestine.

Both A and R are true and R is not the correct explanation of A.

Both A and R are true and R is the correct explanation of A.

A is true but R is false.

A is false but R is true

16 / 25

16. Assertion (A): Evolution is a continuous process.

Reason (R): Organisms keep adapting to their environment over generations.

Both A and R are true and R is the correct explanation of A.

A is false but R is true

A is true but R is false.

Both A and R are true and R is not the correct explanation of A.

17 / 25

17. Assertion (A): Decomposition of vegetable matter into compost is an example of an exothermic reaction.
Reason (R): Exothermic reactions are those reactions in which heat is produced.

A is false but R is true

Both A and R are true and R is not the correct explanation of A.

A is true but R is false.

Both A and R are true and R is the correct explanation of A.

18 / 25

18. Assertion (A): Decomposition reactions require energy in the form of heat, light, or electricity. Reason (R): Energy is needed to break the bonds in the reactants.

Both A and R are true and R is the correct explanation of A.

A is false but R is true

A is true but R is false.

Both A and R are true and R is not the correct explanation of A.

19 / 25

19. Assertion (A): Photosynthesis occurs only in green plants.

Reason (R): Chlorophyll is essential for photosynthesis.

A is false but R is true

Both A and R are true and R is not the correct explanation of A.

Both A and R are true and R is the correct explanation of A.

A is true but R is false.

20 / 25

20. Assertion (A): Human heart does not allow mixing of oxygen-rich blood with carbon dioxide-rich blood.
Reason (R): Human heart has different chambers.

A is true but R is false.

Both A and R are true and R is not the correct explanation of A.

Both A and R are true and R is the correct explanation of A.

A is false but R is true

21 / 25

21. Assertion (A): The focal length of a convex lens is positive.

Reason (R): Convex lenses converge parallel rays of light to a point.

A is true but R is false.

Both A and R are true and R is not the correct explanation of A.

Both A and R are true and R is the correct explanation of A.

A is false but R is true

22 / 25

22. Assertion (A): Acid rain is harmful to aquatic life.

Reason (R): It lowers the pH of water bodies, making the environment acidic.

Both A and R are true and R is the correct explanation of A.

A is false but R is true

Both A and R are true and R is not the correct explanation of A.

A is true but R is false.

23 / 25

23. Assertion (A): The balancing of chemical equations is based on the law of conservation of mass. Reason (R): Total mass of reactants is equal to total mass of products.

Both A and R are true and R is not the correct explanation of A.

Both A and R are true and R is the correct explanation of A.

A is false but R is true

A is true but R is false.

24 / 25

24. Assertion (A): The human heart is a double pump.

Reason (R): It pumps oxygenated blood to the body and deoxygenated blood to the lungs.

Both A and R are true and R is the correct explanation of A.

A is true but R is false.

A is false but R is true

Both A and R are true and R is not the correct explanation of A.

25 / 25

25. Assertion (A): The ozone layer protects life on Earth.

Reason (R): It absorbs harmful ultraviolet radiation from the sun.

Both A and R are true and R is the correct explanation of A.

A is true but R is false.

A is false but R is true

Both A and R are true and R is not the correct explanation of A.

Your score is

The average score is 78%