Question

Which of the following are the Green house gases?
A. Water vapour 
B. Ozone 
C. 1₂ 
D. Molecular hydrogen 
Choose the most appropriate answer from the options given below

• A. A and B only
• B. A and D only
• C. C and D only
• D. B and C only

Answer 1

The Correct Option is A

Greenhouse gases are those gases that absorb and emit infrared radiation, contributing to the greenhouse effect, which warms the Earth's atmosphere. The primary greenhouse gases are: Water vapour (H\(_2\)O): It is a significant greenhouse gas and traps heat in the atmosphere. Ozone (O\(_3\)): It acts as a greenhouse gas, particularly in the troposphere, by trapping infrared radiation. On the other hand: Iodine (\( \text{I}_2 \)): It is not a greenhouse gas because it does not absorb or emit infrared radiation. Molecular hydrogen (H\(_2\)): It is also not a greenhouse gas, as it does not interact with infrared radiation significantly. Thus, the greenhouse gases from the given options are: \[ \text{(A) Water vapour and (B) Ozone.} \] % Explanation Greenhouse gases include CO\(_2\), CH\(_4\) (methane), water vapour, nitrous oxide (N\(_2\)O), CFCs, and ozone. These gases trap heat in the atmosphere, leading to the greenhouse effect.