`BF_(3)` and `B(OH)_(3)` are isoelectronic, but the former is a gas, whereas the later is a solid because

Options

A. `BF_(3)` is a Lewis acid whereas `B(OH)_(3)` is not
B. In `BF_(3), F^(-)` is smaller in size than `OH^(-)` in `B(OH)_(3)`
C. Molecular association is not possible in `BF_(3)` Whereas it is possible in `B(OH)_(3)`
D. They have different polarities.

Answer

C