Indicate the complex ion which shows geometrical isomerism-
1. [Cr(H2O)4 Cl2]+
2. [PT(NH3)3 Cl]
3. [Co(NH3)6]3+
4. [Co(CN)6]3-
Hint: General formula [M(A)4(B)2] show geometrical isomerism
shows geometrical isomerism because it is a MAB, type coordination
compound which contains two set of equivalent ligands, four HO and 2 Cl.
Hence, the possible geometrical isomers are
Hence, correct choice is (a).
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