Question

The $BC{l}_3$ is a planar molecule, whereas $NC{l}_3$ is pyramidal because:

• A. $N-Cl$ bond is more covalent than $B-Cl$ bond
• B. $B-Cl$ bond is more polar than $N-Cl$ bond
• C. Nitrogen atom is smaller than boron
• D. $BC{l}_3$ has no lone pair but $NC{l}_3$ has a lone pair of electron

Answer 1

Answer: (A)

$N-Cl$ bond is more covalent than $B-Cl$ bond

The $BC{l}_3$ is a planar molecule, whereas $NC{l}_3$ is pyramidal because $BC{l}_3$ has no lone pair but $NC{l}_3$ has a lone pair of electron
Hence option $D$ is correct.