Correct Answer: C
Explanation:
concentration of sodium hydroxide be used to avoid the formation of aluminium hydroxide. Hence sodium hydroxide solutions with concentrations of up to 5 molar are used.
Benzene reacts with chlorine in the presence of a catalyst, replacing one of the hydrogen atoms on the ring by chlorine atom is electrophilic substation reaction.
The reaction between benzene and chlorine in the presence of either aluminium chloride or FeCl3 gives chlorobenzene.