Q.

Which of the following statements is not correct for SN2  reactions?

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a

The conversion of reactant to transition state is the rate determining step.

b

Protic solvents increase the rate of reaction.

c

The weaker the leaving base, faster the rate of replacement.

d

The rate depends on the concentration and nature of nucleophile.

answer is C.

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Detailed Solution

(a) The first step involved Haloalkane + nucleophile ~ Transition state is the slow step.

(b) The reaction follows second-order kinetics; rate = k[haloalkane] [ nucleophile]

(c) The weaker the base, faster the replacement.

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