Which of the following molecules has trigonal planar geometry?

{I F}_{3}

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P {C l}_{3}

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{N H}_{3}

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{B F}_{3}

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Solution

The correct option is C ${B F}_{3}$
Boron trifluoride $B F_{3}$ molecule has trigonal planar geometry.
The central B atom has $3$ bond pairs and $0$ lone pairs of electrons. It undergoes $s p^{2}$ hybridisation.
$I F_{3}$ has 'T' shaped geometry. $P C l_{3}$ and $N H_{3}$ have pyramidal geometry.

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