Previous year MCQs

General science UPPSC 2008 GS-I
Question

Among the following greenhouse gases, which does not cause ozone pollution in troposphere?

Answer & Solution

Answer: (Detailed Solution Below)

Option D: Water vapours

Detailed Solution:

The correct answer is “Water vapours”.
Methane, carbon monoxide, and nitrogen oxides (NOx) are all involved in chemical reactions that can lead to the formation of ozone in the troposphere, contributing to ozone pollution.

Water vapor, while a greenhouse gas, does not directly contribute to the formation of ozone in the troposphere.

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