Select the mechanism(s) where the concentration of the nucleophile/base has no effect on the reaction rate.

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Select the mechanism(s) where the concentration of the nucleophile/base has no effect on the reaction rate.

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Answer 1

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Answer #1

In SN2 and E2 reactions rates are altered with the presence of strong nucleophile/base is used in the reaction.

In SN1 and E1 reaction, the rate is dependent on the slowest step that is the formation of the carbocation hence the slowest path will determine the rate of the reaction.

Hence the reaction is independent of nucleophile/base concentration in the case of E1 and SN1 reactions.

Hence the correct answer is A and C

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Answer 2

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