Which of the following is not a redox reaction ?

Options

A. Reaction of `H_2SO_4` with NaOH
B. Production of ozone from oxygen in the atmosphere by lightening
C. Production of nitrogen oxides from nitrogen and oxygen in the atmosphere by lightening
D. Evaporation of water

Answer

C

Explanation

(c) `2NaOH + H_2SO_4 rarr Na_2 underset("neutralization")(SO_4 + 2H_2O)` (not redox reaction)
`3O_2 underset(light)(rarr) 2O_3`, (not redox reaction)
`overset(0)(N)_2 overset(0)(O)_2underset(Light)(rarr) 2 overset(+2-2)(NO)` (redox reaction)
Here oxidation of `N_2`, and reduction of `O_2`, is taking place
`H_2O(1) overset(Delta)(rarr) H_2O(g)` (not redox reaction).