Which among the following are greenhouse gases?

1.Surface ozone (O3)

2.Ammonia (NH3)

3.Methane (CH4)

4.Carbon monoxide (CO)

5.Nitrous oxide (N2O)

A1, 2 & 3 only

B1, 3 & 5 only ✓ Correct

C2, 3 & 4 only

D3, 4 & 5 only

Correct answer: (B) 1, 3 & 5 only

Explanation

Greenhouse gases absorb and re-emit infrared radiation to warm the lower atmosphere.

Statement 1: surface ozone acts as a greenhouse gas near the ground.

Statement 3 and Statement 5: methane and nitrous oxide are potent greenhouse gases.

Statement 2: ammonia is a reactive gas, not a greenhouse gas.

Statement 4: carbon monoxide warms only indirectly and is not counted as one.

The major greenhouse gases also include carbon dioxide and water vapour.

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