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Question

Arrange the following compounds in order of decreasing rate of hydrolysis for SN1 reaction:

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A
II>III>IV>I
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B
IV>III>II>I
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C
III>IV>II>I
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D
I>II>III>I
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Solution

The correct option is A II>III>IV>I
The order of decreasing rate of hydrolysis for SN1 reaction is II>III>IV>I.
Benzyl bromide has lowest rate of hydrolysis for SN1 reaction.
This rate increases when alkyl substituents are present.
The increase is maximum when methyl substituent is present.
The increase is minimum when isopropyl substituent is present.

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