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BF(3) and NF(3) both molecules, are cova...

`BF_(3) and NF_(3)` both molecules, are covalent, but `BF_(3)` is non - polar and `NF_(3)` is polar.Its reason is

A

boron is a metal and nitrogen is a gas in uncombined state

B

`BF_(3)` bonds have no dipole moment whereas `NF_(3)` bond have dipole moment

C

atomic size of boron is smaller than that of nitrogen

D

`BF_(3)` is symmetrical molecule whereas `NF_(3)` is unsymmetrical

Text Solution

Verified by Experts

The correct Answer is:
D
`BF_(3)` is symmetrical planar , although it has polar bonds but resultant dipole moment is zero . In `NF_(3)` , Ione pair cause distortion , hence polarity arises .
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