JEE Main 2025 Apr 8 Shift 2, Chemistry Q6: Isomerism In Co-ordination Compounds

Statement I

In the homoleptic octahedral complex $[\mathrm{M}{\mathrm{A}}_6]$, all six coordination positions are occupied by identical monodentate ligands.

Hence, all ligand positions are equivalent and neither geometrical nor optical isomerism is possible.

$\boxed{\text{Statement I is True}}$

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Statement II

Cisplatin and transplatin have the formula

$\boxed{[\mathrm{Pt}(\mathrm{N}{\mathrm{H}}_3{)}_2\mathrm{C}{\mathrm{l}}_2]}$

They contain two different ligands ($\mathrm{N}{\mathrm{H}}_3$ and $\mathrm{C}{\mathrm{l}}^{-}$), so they are heteroleptic complexes of platinum (Pt), not palladium (Pd).

Hence, Statement II is incorrect.

$\boxed{\text{Statement II is False}}$

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Conclusion

Statement I is True and Statement II is False.

$\boxed{\text{Correct Answer: Option (4)}}$