List of top Chemistry Questions on Chlorine asked in AP EAPCET

In which of the following reactions, chlorine undergoes disproportionation? \[ \begin{aligned} \text{I.} \quad & \text{Reaction with cold, dilute NaOH} \\ \text{II.} \quad & \text{Reaction with hot, concentrated NaOH} \\ \text{III.} \quad & \text{Reaction with } \mathrm{H_2S} \end{aligned} \] The correct answer is