Question

Assertion (A): Carbon dioxide is a greenhouse gas.

Reason (R): It is transparent to the incoming solar radiation and opaque to the outgoing terrestrial radiation.

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

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

Explanation:

Carbon dioxide is a greenhouse gas because it is transparent to the incoming solar radiation but opaque to the outgoing terrestrial radiation. This means it allows sunlight to enter the Earth’s atmosphere but absorbs and traps the heat radiated back from the Earth’s surface, contributing to the greenhouse effect and warming the planet. Hence, both statements A and R are true, and R correctly explains why carbon dioxide acts as a greenhouse gas.