An ion M2+, forms the complexes [M(H2O)6]2+, [M(en)3]2+ and [MBr6]4–, match the complex with the app

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An ion M2+, forms the complexes [M(H2O)6]2+, [M(en)3]2+ and [MBr6]4–, match the complex with the appropriate colour.

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Sol. ⇓ ↑E = $\frac{hc}{\lambda \downarrow}$⇒ $\overset{\quad VIB\overset{*}{G}Y\overset{*}{O}\overset{*}{R}(\lambda \uparrow )\quad}{\rightarrow}$ (absorbed spectrum)⇒ among green, orange, Red⇒ green has less λ, and more energy⇒ since, among all ligands en is strongest, absorbed color of compound containing en is green⇒ observed color of [M(en)3]+3 is complementing color of green which is Red.Strength of ligand:- en > H2O > Brλen < $\lambda_{H_{2}O}$< λBr⇒ Blue → [M (H2O)6]±nGreen → [M (Br)6]±n

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