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NEET levelSingle correct optionDifficulty 1 of 3hc149

Benzene reacts with excess chlorine in bright sunlight (no halogen carrier). The product is

Achlorobenzene
B $C X_{6} H X_{6} Cl X_{6}$ (1,2,3,4,5,6-hexachlorocyclohexane)
C1,4-dichlorobenzene
Dhexachlorobenzene, $C X_{6} Cl X_{6}$

Answer: B

Under UV or sunlight, chlorine adds to benzene by a free radical addition mechanism, giving

C X_{6} H X_{6} Cl X_{6}

(benzene hexachloride). Substitution requires a Lewis acid such as

FeCl X_{3}

in the dark.

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