Question

The replacement of a hydrogen atom in benzene by alkyl group can be brought about with the following reagents :

• A. alkyl chloride and $AlC{l}_3$
• B. alkene and $AlC{l}_3$
• C. alkanol and alkali
• D. alkanol and acid

Answer 1

Answer: (A), (B), (D)

The correct options are
A alkanol and acid
B alkyl chloride and $AlC{l}_3$
D alkene and $AlC{l}_3$

The replacement of a hydrogen atom in benzene by alkyl group can be brought about with alkyl chloride in presence of anhydrous aluminum chloride. The reaction is known as Friedel craft's alkylation reaction.
This can also be carried out by using alkene and aluminium chloride or alkanol and acid.