Question

For preparing monoalkyl benzene, acylation process is preferred than direct alkylation because:

• A. in alkylation, a poisonous gas is evolved
• B. in alkylation, large amount of heat is evolved
• C. in alkylation, polyalkylated product is formed
• D. alkylation is very costly

Answer 1

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 the reduction of carbonyl group to methylene group.