Indentify the reactions that occur in photochemical smog .
(i) ` CH_2 = O + H_2 to CH_3 OH`
(ii) `NO_2(g) overset(hv)(to) NO(g) + O(g) , O(g) + O_2(g) to O_3 (g) `
(iii) `3CH_4 + 2O_3 to 3CH_2 = O + 3H_2O`
(iv) `NO(g) + O_3 (g) to NO_2 (g) + O_2 (g) `

Options

A. (ii) , (iii) , (iv)
B. (i) , (ii) , (iii)
C. (i) , (iii) , (iv)
D. (i), (iii) , (iv)

Answer

A

Explanation

Formation of `NO, O_3, NO_2` and `CH_2O` occur in photochemical smog. Photochemical smog is a type of air pollution due to reaction of solar radiation with airborne pollutant mixtures of nitrogen oxides (NO) and organic compounds (hydrocarbon). Therefore, oxidation and reduction reactions found in photochemical smog.