Chlorobenzene is

• A. less reactive than benzyl chloride
• B. more reactive than ethyl bromide
• C. nearly as reactive as methyl chloride
• D. more reactive than isopropyl chloride

Chlorobenzene is a compound that exhibits unique reactivity compared to other chlorinated hydrocarbons. To evaluate its reactivity, let's look at the options provided:

Comparison of Reactivity

• A. Less reactive than benzyl chloride: This is true. Benzyl chloride is more reactive due to the stability of the benzyl carbocation formed during reactions.
• B. More reactive than ethyl bromide: This statement is incorrect. Ethyl bromide is generally more reactive because bromine is a better leaving group than chlorine.
• C. Nearly as reactive as methyl chloride: This is not accurate. Methyl chloride is more reactive than chlorobenzene due to the presence of a primary carbon, which is more favorable for nucleophilic substitution.
• D. More reactive than isopropyl chloride: This is also incorrect. Isopropyl chloride is more reactive than chlorobenzene due to the tertiary carbon structure that stabilizes the carbocation.

In summary, chlorobenzene is less reactive than benzyl chloride, making option A the correct choice. Its structure and the nature of the carbon-chlorine bond influence its overall reactivity in chemical reactions.