The carbon atoms in benzene are :

The carbon atoms of benzene are:

Fill in the blanks with appropriate words. Benzene has a planar structure. All carbon atoms in benzene are (I)____ hybridised. The ring structure of benzene was proposed by (II)________. It shows (III)_______substitution reactions. It reacts with (IV)_________in presence of aluminium chloride to form acetophenone.

Six carbon atoms of benzene are of: