Which of the following molecules / ions can exhibit isomerism?
(A) Tetrahedral `NiCI_2 Br_2^(2-)`Tetrahedral `NiCI_2 Br_2^(2-)`
(B) Square planar `Pt (NH_3)_2 CI_2`
( C) Octahedral `Co(NH_3)_3 CI_3`
(D) Square planar `Pd(NH_3)_3 Br^+`
(E) Octahedral `Co (end)_3^(3+)`
where, end = 1,2 - di amino ethane

Options

A. A, B, C, D
B. B, C, E
C. B, C, D
D. A, B , C, E

Answer

B

Explanation

Tetrahedral compounds do not show isomerism because relative position of unidentate ligand attached to the central atom are same with respective to each other. Square planar compounds of type `Ma_2 b_2` shows geometric isomerism.
Octahedral compounds of type `Ma_3 b_3` shows geometri isomerism and of type `M (AA)_3` exhibits optical isometism.