Question

Which of the following are isostructural pairs?

(A) \[\ce{SO^{2-}4}\] and \[\ce{CrO^{2-}4}\]

(B) SiCl₄ and TiCl₄

(C) NH₃ and \[\ce{NO^-3}\]

(D) BCl₃ and BrCl₃

Options

• A and C only

• A and B only

• B and C only

• C and D only

Answer 1

A and B only

Explanation:

The species having similar structures are called Isostructural.

Species (Ion)	Hybridisation	Geometry
\[\ce{SO^{2-}4}\]	sp3	Tetrahedral
\[\ce{CrO^{2-}4}\]	sp3	Tetrahedral
SiCl4	sp3	Tetrahedral
TiCl4	sp3	Tetrahedral
NH3	sp3	Pyramidal
\[\ce{NO^{-}3}\]	sp2	Trigonal planar
BCl3	sp2	Trigonal planar
BrCl3	sp3d	T-shaped