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Question

BF3 and NF3 both molecules are covalent, but BF3 is non-polar and NF3 is polar. Its reason is


A

In uncombined state boron is metal and nitrogen is gas

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B

B - F bond has no dipole moment whereas N - F bond has dipole moment

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C

The size of boron atom is smaller than nitrogen

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D

BF3 is planar whereas NF3 is pyramidal

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Solution

The correct option is D

BF3 is planar whereas NF3 is pyramidal


BF3 is planar while NF3 is pyramidal due to the presence of lone pair of electron on nitrogen in NF3.


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