Question:

Consider the reaction : Cl2(aq) + H2S(aq) → S(s) + 2H+(aq) + 2Cl−(aq). The rate equation for this reaction is k[Cl2][H2S]. Which of these mechanisms is/are consistent with this rate equation?

A only

B only

Neither A nor B

Both A and B

Rate equation is to be derived with respect to slow step. From mechanism (A), Rate = k[Cl2][H2S]