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Observe the following two reaction of be...

Observe the following two reaction of benzene.
A) `C_6H_6 + CH_3Cl underset(K_1)overset(AlCl_3)to C_6H_5CH_3` B) `C_6H_5D + CH_3Cl underset(K_2)overset(AlCl_3)to C_6H_5CH_3 `
The relation between rate constant of the two reactions will be.

A

`K_1 gt K_2`

B

`K_2 gt K_1`

C

`K_1 = K_2`

D

Not definite

Text Solution

Verified by Experts

The correct Answer is:
C
Electrophilic substitution reactions invovled two steps , cleavage of the `C-H or C-D` step (fast step) , which being fast does not effect the rate of reaction .
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