Question

Hybridisation involves the mixing of orbitals having comparable energies of same atom. Hybridised orbitals perform efficient overlapping than overlapping by pure $s,p$ or $d$ orbitals.
Consider the following compounds and select the incorrect statements among the following:
$N{H}_3,P{H}_3,H_{2}S,S{O}_2,S{O}_3,B{F}_3,PC{l}_3,I{F}_7,P_4,H_2$

• A. Six molecules out of the following involves hybridisation
• B. Three molecules are hypervalent compounds
• C. Six molecules out of the above compounds are non-planar in structure
• D. Two molecules out of the given compounds involves $(d\pi -p\pi )$ as well as also involves $(p\pi -p\pi )$ bonding

Answer 1

The correct option is C Six molecules out of the above compounds are non-planar in structure

(a) Six molecules $(N{H}_3,S{O}_2,S{O}_3,B{F}_3,PC{l}_3,I{F}_7)$ out of the following involves hybridisation.
(b) A hypervalent molecule (the phenomenon is sometimes colloquially known as expanded octet) is a molecule that contains one or more main group elements apparently bearing more than eight electrons in their valence shells.
Among the given molecules hypervalent molecules are: $S{O}_3,S{O}_2,I{F}_7$.
(c) Among the given molecules, only five molecules are non-planar $N{H}_3,P{H}_3,PC{l}_3,I{F}_7,P_4$
(d) $S{O}_2\text{one}p\pi -p\pi \text{bond and one}d\pi -p\pi \text{bond}\text{and}S{O}_3\text{one}p\pi -p\pi \text{bond and two}d\pi -p\pi \text{bond}$.