Question

$N{H}_3$ has a net dipole moment but $B{F}_3$ does not because

• A. B is less electronegative than N
• B. F is more electronegative than B
• C. is planar but is pyramidal
• D. is pyramidal but is planar

Answer 1

The correct option is C is planar but is pyramidal

$B{F}_3$ is flat and symmetrical having net dipole moment of zero where as $N{H}_3$ is non planar and has lone pair due to which it has a net dipole moment.