Question

Which bond is least covalent?

• A. $S-F$ in ${SF}_2$
• B. $S-F$ in ${SF}_4$
• C. $S-F$ in ${SF}_6$
• D. $S-F$ in ${SF}_8$

Answer 1

Answer: (A)

$S-F$ in ${SF}_2$

Where non. Metallic nature increases, covalency increases more.

$\therefore {SF}_2$ least covalent.

$Note:$ (${}^{\prime }{F}^{\prime }$ causes more charge contraction, so more covalency)