Question

Which one of the following molecules has the least dipole moment?

• A. $H_{2}O$
• B. $Be{F}_2$
• C. $N{H}_3$
• D. $N{F}_3$
• E. $B{F}_3$

Answer 1

Answer: (B)

Be $F_2$ has herodipole moment due to linear geometry

a	$H_{2}O$		$\mu \ne 0$	(Bent shape)
b	$Be{F}_2$		$\mu =0$	(Linear)
c	$N{H}_3$		$\mu \ne 0$	(Pyramidal)
d	$N{F}_3$		$\mu \ne 0$	(Pyramidal)
e	$B{F}_3$		$\mu =0$	(Trigonal planar)