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  4. The electrophile involved in the sulphonation of Benzene is

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Q. The electrophile involved in the sulphonation of Benzene is

KCETKCET 2009Hydrocarbons

Solution:

The electrophile involved in the sulphonation of benzene is $SO _{3}$.

$2 H _{2} SO _{4} \longrightarrow SO _{3}+ H _{3} O ^{+}+ HSO _{4}^{-}$