Chemistry - GOC Question with Solution | TestHub

Due to conjugation of lone pair of chlorine with$\mathrm{\pi }$bond of$\mathrm{C}–\mathrm{C}$, partial double bond character decrease bond length that’s why${\mathrm{CH}}_2=\mathrm{CH}–\mathrm{Cl}$have$\mathrm{C}–\mathrm{Cl}$shortest bond length.