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Which of the following aromatic rings IS alkylated most rapidly by chloroethane/AlCI3?
benzene ethylbenzene bromobenzene benzenesulfonic acid nitrobenzene
Solution
ethylbenzene is alkylated most rapidly due to the presence of electron donating group.
Explanation: ethyl group on benzene ring is an electron donating group and increases the
electron density on benzene ring. so the electrophilic aromatic substitution occurs more rapidly.

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  • 1. Which of the following aromatic rings IS alkylated most rapidly by chloroethane/AlCI3? benzene ethylbenzene bromobenzene benzenesulfonic acid nitrobenzene Solution ethylbenzene is alkylated most rapidly due to the presence of electron donating group. Explanation: ethyl group on benzene ring is an electron donating group and increases the electron density on benzene ring. so the electrophilic aromatic substitution occurs more rapidly.