Question

The pair(s) of coordination complexes/ion exhibiting the same kind of isomerism is (are):
(i) `[Cr(NH_(3))_(5)CI]CI_(2)` and `[Cr(NH_(3))_(4)CI_(2)]CI`
(ii) `[Co(NH_(3))_(4)CI_(2)]^(+)` and `[Pt(NH_(3))_(2)(H_(2)O)CI]^(+)`
(iii) `[CoBr_(2)CI_(2)]^(2-)` and `[PtBr_(2)CI_(2)]^(2-)`
(iv) `[Pt(NH_(3))_(3)(NO_(3))]CI` and `[Pt(NH_(3))_(3)CI]Br`
A. (i) and (iii)
B. (i), (ii), (iii)
C. (i), (ii), (iii), (iv)
D. (ii) and (iv)

Answer 1

Correct Answer - D
In the first pair, first complex exhibits no isomerism while the 2nd one exhibits geometrical isomerism. In the second pair, both the complex ions exhibit geometrical isomerism:

In the third pair, both tetrahedral complex ions do not exhibit any isomerism:
`[Pt(NH_(3))_(3)(NO_(3))]C1` and `[Pt(NH_(3))_(3)C1]NO_(3)`
`[Pt(NH_(3))_(3)C1]Br` and `[Pt(NH_(3))_(3)Br]C1`