Question

The bond length (pm) of ${F_2, H_2, Cl_2}$ and ${I_2}$, respectively is

• A. 144,74,199,267
• B. 74144199267
• C. 74267199144
• D. 144,74,267,199

Answer 1

Answer: (A)

144,74,199,267

Answer 2

Bond length $\propto$ atomic size.
Higher is the atomic size, higher is the bond length and vice versa.
Hydrogen has the lowest atomic size. Hence, $H - H$ has the lowest bond length.
Iodine has the highest atomic size. Hence, I - I has the highest bond length.
The bond length (pm) of $F _{2}, H _{2}, Cl _{2}$ and $I _{2}$, respectively is $144,74,199,267$.