The octahedral complex of a metal ion M3+ with four monodentate ligands L1, L2, L3 and L4 absorb wavelengths in the region of red, green, yellow and blue, respectively. The increasing order of ligand strength of the four ligands is:

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Question

The octahedral complex of a metal ion M³⁺ with four monodentate ligands L₁, L₂, L₃ and L₄ absorb wavelengths in the region of red, green, yellow and blue, respectively. The increasing order of ligand strength of the four ligands is:

L₄ < L₃ < L₂ < L₁

L₁ < L₂ < L₄ < L₃

L₃ < L₂ < L₄ < L₁

L₁ < L₃ < L₂ < L₄

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$\overset{Energy decresing order}{\to}$

Strength of ligand α energy of light absorbed

$E = \frac{hc}{λ}$

L₁ < L₃ < L₂ < L₄