The Following Mechanism Has Been Suggested for the Reaction Identify the Molecularity of the Rate Determining Step

question 76

Multiple Choice

The following mechanism has been suggested for the reaction: $\begin{array}{ll}\mathrm{H}_{2} \mathrm{O}_{2}+2 \mathrm{H}^{+}+2 \mathrm{I}^{-} \rightarrow \mathrm{I}_{2}+2 \mathrm{H}_{2} \mathrm{O} \\\mathrm{H}_{2} \mathrm{O}_{2}+\mathrm{I}^{-} \rightarrow \mathrm{HOI}+\mathrm{OH}^{-} & \mathrm{Slow}\\\mathrm{OH}^{-}+\mathrm{H}^{+} \rightarrow \mathrm{H}_{2} \mathrm{O} & \mathrm{Fast}\\\mathrm{HOI}+\mathrm{H}^{+}+\mathrm{I}^{-} \rightarrow \mathrm{I}_{2}+\mathrm{H}_{2} \mathrm{O}& \mathrm{Fast}\end{array}$ Identify the molecularity of the rate determining step.

• A) unimolecular
• B) bimolecular
• C) termolecular
• D) unimolecular and bimolecular
• E) bimolecular and termolecular

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