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

Options

A. Boron is a solid and nitrogen is a gas in free state
B. `BF_(3)` is planner but `NF_(3)` is pyramidal in shap
C. Boron is a metalloid while nitrogen is a non-metal
D. Atomic size of boron is smaller than that of nitrogen

Answer

b

Explanation

`BF_(3)` is planar, hence the dipole moment of the molecule is zero `NF_(3)` is pyramidal, thus it posses dipole moment Hence `NF_(3)` is a pole compounds