Question

Bf3 is non polar while nf3 is polar

Answer 1

Boron is a metal and nitrogen is a gas in uncombined state, BF3 bonds have no dipole moment whereas NF3 bond have dipole moment, atomic size of boron is smaller than that of nitrogen,BF3 is symmetrical molecule whereas NF3 is unsymmetrical. Because of this NF3 is polar and BF3 is non polar.

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