Suggest the name of a Lewis acid other than anhydrous aluminum chloride which can be used during ethylation of benzene.

The ethylation reaction of benzene happens when an ethyl group is added to the benzene ring. Such a reaction is called a Friedel-Craft alkylation reaction. This reaction takes place in the presence of a Lewis acid.

Any Lewis acid like anhydrous FeCl₃, SnCl₄, BF₃ etc. can be used during the ethylation of benzene.