Question

Which of the following bond is nonpolar covalent?

• A. $SiSi$ bond in ${Cl}_{3}SiSi{Cl}_3$
• B. $SiCl$ bond in ${Cl}_{3}SiSi{Cl}_3$
• C. $CaF$ bond in ${CaF}_3$
• D. $NH$ bond in ${NH}_3$

Answer 1

The correct option is A $SiSi$ bond in ${Cl}_{3}SiSi{Cl}_3$

$Si-Si$ bond in $C{l}_3-Si-Si-C{l}_3$ is non-polar covalent as they are identical elements with the same electronegativity. Hence, dipole moment=0.

Hence, option $A$ is correct.