Question

Assertion (A): Heat absorption capacity of air is more in the lower layers than in upper layers.

Reason (R): Air on the surface of the earth is denser and contains more carbon dioxide, water vapour and other gases.

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:

The lower layers of the atmosphere (especially the troposphere) are denser and contain higher amounts of carbon dioxide, water vapour, and other greenhouse gases. These gases have a high capacity to absorb and retain heat, making the lower atmosphere warmer. Therefore, the heat absorption capacity is greater in the lower layers, and the reason given directly explains the assertion.