Which one of the following molecule is planar?

N F_{3}

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N C l_{3}

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P H_{3}

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B F_{3}

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Solution

The correct option is D $B F_{3}$
$N F_{3}, N C l_{3}, P H_{3}$ - They all have trigonal pyramidal geometry.
They all have a lone pair of electrons on their central atom.
Whereas $B H_{3}$ does not have a line pair, and is there planar.

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