Question

Assertion (A): Cloudy days are cool, while the cloudy nights are cooler.

Reason (R): Clouds trap the heat.

Options

• Both A and R are true, and R is the correct reason for A.

• Both A and R are true, but R is not the correct reason for A.

• A is true, and R is false.

• A is false, and R is true.

Answer 1

A is false, and R is true.

Explanation:

Cloudy days are not necessarily cool; clouds block sunlight during the day, which can lower daytime temperatures, making it cooler, but cloudy nights are generally warmer, not cooler, because clouds trap the heat (terrestrial radiation) emitted from the Earth’s surface, preventing rapid cooling at night. So, clouds do trap heat, but the assertion that “cloudy nights are cooler” is false. Instead, cloudy nights tend to be warmer compared to clear nights due to this heat-trapping effect.