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# The molecule that has minimum/no role in the formation of photochemical smog, is :

Question:

The molecule that has minimum/no role in the formation of photochemical smog, is :

1. $\mathrm{CH}_{2}=\mathrm{O}$

2. $\mathrm{N}_{2}$

3. $\mathrm{O}_{2}$

4. $\mathrm{NO}$

Correct Option: , 2

Solution:

Chiefly $\mathrm{NO}_{2}, \mathrm{O}_{3}$ and hydrocarbon are responsible for build up smog.