Which of the following is a disproportionation reaction?

Options

A. `Cl_(2(g))+2OH_((aq))^(-)rarrClO_((aq))^(-)+Cl_((aq))^(-)+H_(2)O_((l))`
B. `Cl_(2(g))+2I_((aq))^(-)rarr 2Cl_((aq))^(-)+I_(2(s))`
C. `2Fe_((s))+3H_(2)O_((l))overset(Delta)rarr Fe_(2)O_(3(s))+3H_(2(g))`
D. `2H_(2)O_((l))+2F_(2(g))rarr 4HF_((aq))+O_(2(g))`

Answer

A

Explanation

`overset(0)Cl_(2(g))+2OH_((aq))^(-)rarr overset(+1)(Cl)O_((aq))^(-)+overset(-1)Cl_((aq))^(-)+H_(2)O_((l))`
Chlorine is simultaneously reduced and oxidised.