Which one of the following reactions is not an example of redox reaction?

Options

A. `Cl_(2)+2H_(2)O+SO_(2) rarr 4H^(+)+SO^(4-)2Cl^(-)`
B. `Cu^(++)+Zn rarr Zn^(++)+Cu`
C. `2H_(2)+O_(2) rarr 2H_(2)O`
D. `HCl+H_(2)O rarr H_(3)O^(-)+Cl^(-)`

Answer

D

Explanation

In reaction `HCl+H_(2)O rarr H_(3)O^(-)+Cl^(-)`, only reduction has taken place, not oxidation.