Which of the following is not a green house gas

GS Air

Which of the following is not a green house gas?

  1. nitrogen gas
  2. water vapour
  3. methane gas
  4. carbon dioxide

Answer

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

The correct option is A.

Question 2

Which of the following is not a green house gas?

  1. Methane
  2. Carbon dioxide
  3. Carbon monoxide
  4. Ammonia

Answer

Greenhouse effect is a process by which thermal radiations from a planetary surface, (e.g., earth) are absorbed by atmospheric greenhouse gases and are re-radiated in all the directions causing an increase in the overall temperature of the planet (earth). By percentage contribution to the greenhouse effect on the earth the four major gases are:

  1. Water vapour 36-70%
  2. Carbon dioxide 9-26%
  3. Methane 4-9%
  4. Ozone 3-7%

Other greenhouse gases are nitrous oxide (N2O) and CFC (chloroflouro carbons).

The correct option is D.