Question

Assertion (A): Under conditions of high relative humidity, the rate of evaporation of sweat from the skin decreases and the human being feels warm and uncomfortable.

Reason (R): The human body dissipates heat through perspiration and its evaporation.

Options

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

• Both A and Rare true but R does not explain A.

• A is true but R is false.

• A is false but R is true.

Answer 1

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

Explanation:

When relative humidity is high, the air is nearly saturated with moisture, so sweat evaporates slowly. Since evaporation of sweat cools the body, its reduced rate leads to a feeling of heat and discomfort. The reason accurately explains the assertion.