Fluorine is more electronegative than either boron or phosphorus.… - Vidyadip

MCQ

Fluorine is more electronegative than either boron or phosphorus. What conclusion can be drawn from the fact that $B{F_3}$ has no dipole moment but $P{F_3}$ does

A
$B{F_3}$ is not spherically symmetrical but $P{F_3}$ is
B
$B{F_3}$ molecule must be linear
C
The atomic radius of $P$ is larger than the atomic radius of $B$
✓
The $B{F_3}$ molecule must be planar triangular

✓

Answer

Correct option: D.

The $B{F_3}$ molecule must be planar triangular

d
The $BF_3$ molecule must be planar triangular.

$BF _3$ is planar triangular while $PF _3$ is pyramidal.

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