In Chlorination of benzene, which of the following acts as an electrophile?
Correct answer: A. Cl+
- A. Cl+
- B. Cl-
- C. Cl
- D. FeCl3
Explanation
In the chlorination of benzene, the electrophile is the chloronium ion (Cl+), which is formed in the presence of a Lewis acid like FeCl3. The chloronium ion attacks the benzene ring, replacing a hydrogen atom and forming chlorobenzene. The other options, Cl-, Cl, and FeCl3, are not electrophiles and do not participate directly in the reaction.
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About Benzene and Aromatic Compounds
Benzene has a planar ring of delocalised π electrons, giving aromatic stability and equal carbon-carbon bond lengths. The topic covers resonance, electrophilic substitution reactions such as nitration, halogenation, sulphonation and Friedel-Crafts reactions, along with substituent effects and the distinction between substitution in benzene and addition in ordinary alkenes.
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