GEOLOGY

Detailed explanation-1: -Carbon dioxide, methane and water vapour are greenhouse gases. But the main constituents of the atmosphere nitrogen and oxygen are not greenhouse gases.

Detailed explanation-2: -Carbon monoxide is not a greenhouse gas. Methane, carbon dioxide, nitrogen dioxide, ozone and water vapour gases are the greenhouse gases.

Detailed explanation-3: -The vibrations of any gas molecule such as nitrogen and oxygen tend to be invisible to the electromagnetic field. It does not absorb infrared light, in other words, they are not infrared active. Hence, both these gases are not greenhouse gases as they are transparent to infrared light.

Detailed explanation-4: -The various greenhouse gases are carbon dioxide, methane, chlorofluorocarbon, ozone, nitrous oxide, and water vapor. Hence the gas which is not a greenhouse gas is nitrogen and the correct answer for the given question is option d).

Detailed explanation-5: -Q. Which of the following is not a greenhouse gas? (1) Carbon dioxide (2) Sulphur dioxide (3) Methane (4) Nitrogen. Ans. The answer is Nitrogen.