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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