The molecule that has minimum/no role in the formation

Question:

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

 

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

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

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

  4. NO

Correct Option: 1

Solution:

$\mathrm{NO}, \mathrm{O}_{3}$ and $\mathrm{HCHO}$ are responsible for the formation of photochemical smog while $\mathrm{N}_{2}$ has no role in photochemical smog.

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