Question

A central atom in a molecule has two lone pairs of electron and forms three single bonds. The shape of this molecules is:

• A. Trigonal pyramidal
• B. T- shaped
• C. See-saw
• D. Planar triangular

Answer 1

The correct option is B T- shaped

$\text{Steric number}=2\text{Lone pair electrons}+3\text{Bond pair electrons}$
$\text{Steric number}=5$
For steric number 5, the hybridisation is $s{p}^{3}d$
$s{p}^{3}d$ hybridisation with 2 lone pair of electrons will have T-shape.