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Alkylbenzene is formed when benzene is treated with an alkyl halide in the presence of anhydrous aluminum chloride. Identify the type of reaction.

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Alkylbenzene is formed when benzene is treated with an alkyl halide in the presence of anhydrous aluminum chloride. Identify the type of reaction.

(a) Halogenation

(b) Friedel-Crafts acylation reaction

(c) Friedel-Crafts alkylation reaction

(d) Sulphonation

I had been asked this question in semester exam.

This interesting question is from Aromatic Hydrocarbon in portion Hydrocarbons of Chemistry – Class 11

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The correct choice is (c) Friedel-Crafts alkylation reaction

The explanation is: Aluminum chloride reacts with methyl chloride to form an electrophile. This electrophile attacks the π electron to form carbocation. As a result, alkylbenzene is formed along with HCl as product.

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