Question

The pair of species having identical shapes for molecules of both species is
(a) CF₄,SF₄ 

(b) XeF₂,CO₂

(c) BF₃,PCl₃ 

(d) PF₅,IF₅ .

Answer 1

Correct option(b) XeF₂,CO₂

Explanation:

XeF₂ contains sp³d hybridised Xe atom with three lone pairs of electrons. Fluorine atoms occupy axial positions while three lone pairs of electrons occupy equatorial positions in trigonal bipyramid. Since the lone pair of electrons does not consider for the shape of the molecule, thus, the shape of XeF₂ comes out to be linear. While C -atom of CO₂ is sp hybridised and thus, possesses a linear shape.