Q. Which one of the following molecules has the least dipole moment?
Solution:
Be $F_{2}$ has herodipole moment due to linear geometry
a
$H_{2}O$
$\mu \neq 0$
(Bent shape)
b
$BeF_{2}$
$\mu = 0$
(Linear)
c
$NH_{3}$
$\mu \neq 0$
(Pyramidal)
d
$NF_{3}$
$\mu \neq 0$
(Pyramidal)
e
$BF_{3}$
$\mu = 0$
(Trigonal planar)
| a | $H_{2}O$ | |
$\mu \neq 0$ | (Bent shape) |
| b | $BeF_{2}$ | |
$\mu = 0$ | (Linear) |
| c | $NH_{3}$ | |
$\mu \neq 0$ | (Pyramidal) |
| d | $NF_{3}$ | |
$\mu \neq 0$ | (Pyramidal) |
| e | $BF_{3}$ | |
$\mu = 0$ | (Trigonal planar) |