Which of the following reactions involve disproportionation ?

Options

A. `2H_(2) SO_(4) + Cu rarr CuSO_(4) +2H_2O +SO_2`
B. `As_(2)O_3 +3H_(2)S rarr As_(2)S_3 + 3H_2O`
C. `2KOH + Cl_2 rarr KCl + KOCl + H_2O`
D. `Ca_3P_2 +6H_2O rarr 3Ca(OH)_2 +2PH_3`

Answer

C

Explanation

A reaction, in which a substance undergoes simultaneous oxidation and reduction, is called disproportionation reaction. In these reactions, the same substance simultaneously acts as an oxidising agent and as a reducing agent. Here Cl undergoes simultaneous oxidation and reduction.
`2KOH +underset(0)(Cl_2) rarrunderset(-1)(KCl)+underset(-1)(KOCl)+H_2O`