Benzene reacts with Cl_2 in the presence of anhydrous FeCl_3 (a Lewis acid catalyst, dark/cold conditions) to give mainly

JEE Main Chemistry question

Benzene reacts with Cl in the presence of anhydrous FeCl (a Lewis acid catalyst, dark/cold conditions) to give mainly

(A)Benzene hexachloride (addition product)
(B)Chlorobenzene (substitution product)Correct
(C)Benzyl chloride
(D)Hexachlorobenzene exclusively

Answer: (B)

Solution

With a Lewis-acid catalyst (FeCl or AlCl) generating the electrophile Cl, benzene undergoes electrophilic *aromatic substitution* (not addition), replacing one ring hydrogen to give

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Question ID VK-142423