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KI in Acetone undergoes SN2 reaction wi...

KI in Acetone undergoes `S_N2` reaction with each of P, Q, R, S. The decreasing order of rate of reaction is:

The correct choice is

A

`P gt Q gt R gt S`

B

`S gt P gt R gt Q`

C

`S gt P gt Q gt R`

D

`P gt S gt R gt Q`

Text Solution

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The correct Answer is:
B
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