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The electrophile in the sulphonation of ...

The electrophile in the sulphonation of arenes is

A

`H_2SO_4`

B

`HSO_4^-`

C

`SO_3`

D

`SO_3H^+`

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The correct Answer is:
D
Electrophiles are electron deficient.
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MARVEL PUBLICATION-BASIC PRINCIPLES AND TECHNIQUES IN ORGANIC CHEMISTRY-Test your grasp
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