In which of the following reactions does Cl2 undergo disproportionation?

JEE Main levelOne or more correct optionsDifficulty 2 of 3ph198

In which of the following reactions does $Cl X_{2}$ undergo disproportionation?

Disproportionation means the same element is both oxidised and reduced. Cold dilute NaOH gives

Cl X^{-}

and

OCl X^{-}

, hot concentrated NaOH gives

Cl X^{-}

and

ClO X_{3} X^{-}

, and water gives

HCl

and

HOCl

. With

H X_{2} S

, chlorine is only reduced, giving

Cl X^{-}