Question

$C-Cl$ bond in chlorobenzene in comparison to $C-Cl$ bond in methyl chloride is

• A. Longer and weaker
• B. Shorter and weaker
• C. Shorter and stronger
• D. Longer and stronger

Answer 1

Answer: (C)

Because of $+R$ effect of $Cl$-atom with the ring, $C-Cl$ bond in chlorobenzene gets a double bond character and it becomes shorter and stronger than the $C-Cl$ bond of in methyl chloride $\left(C{H}_3-Cl\right)$, which does have such effect.