Question

$S_1:B{F}_3\text{has planar geometry}$
$S_2:B{F}_3\text{is volatile liquid even at room temperature}$
$S_3:B{F}_3\text{is Lewis acid}$
$S_4:B{F}_3\text{forms adduct with}N{H}_3$

Choose the correct option.

• A. F T T T
• B. T F T T
• C. F F T T
• D. F T T F

Answer 1

The correct option is B T F T T

$B{F}_3$ is a toxic gas, has $s{p}^2$ hybridization and is also electron deficient compound. To complete it's octet, it acquires a lone pair of electrons from ammonia and thus forms addition compound.
$B{F}_3+\stackrel{\bullet \bullet }{N}{H}_3⟶[H_{3}N\to B{F}_3]$