Acylation process is preferred than direct alkylation because (by the Friedel-Craft's reaction)
A
In alkylation, a poisonous gas is evolved
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B
In alkylation, large amount of heat is evolved
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C
In alkylation, polyalkylated product is formed
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D
Alkylation is very costly
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Solution
The correct option is C
In alkylation, polyalkylated product is formed
When benzene is alkylated, along with mono alkyl benzene, polyalkylation products are also obtained. Hence, instead of direct alkylation, acylation is preferred. This is followed by reduction of carbonyl group to methylene group.