Question

Assertion (A): Water is used in car radiators as a coolant.

Reason (R): Water has high specific heat capacity.

• 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 and R is false.
• D. A is false and R is true.

Answer 1

The correct option is A

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

Explanation of the correct option:

Assertion:

• Water is used in car radiators as a coolant.
• It can be used to regulate the temperature of a system.
• It has a high specific heat capacity.
• So, it can absorb a large amount of heat for a degree rise in temperature.
• It can transfer a lot of heat without itself breaking down.

This statement is true.

Reason:

• Water has a high specific heat capacity.
• The specific heat capacity of water is $4182\mathrm{J}/\mathrm{kg}°\mathrm{C}$.

This statement is also correct.

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

Hence, the correct answer is (A).