Question

The molecules/ions that are linear and have zero dipole moments are :

• A. $BrC{l}_2^{-}$
• B. $N_{2}O$
• C. $N_3^{-}$
• D. $S{O}_2$

Answer 1

Answer: (A), (C)

$BrC{l}_2^{-}$
$N_3^{-}$

$BrC{l}_2^{-}$ is $s{p}^{3}d$ hybridized, but due to its symmetrical structure has zero dipole moment.

$N_{2}O$ is $sp$ hybridized, but due to unsymmetrical structure has non zero dipole moment.

$N_3^{-}$ is $sp$ hybridized, so has zero dipole due to symmetrical structure.

$S{O}_2$ has $s{p}^2$ hybridization and has 2 bond pairs and 1 lone pair and has some dipole.