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The octahedral complex of a metal ion M^...

The octahedral complex of a metal ion `M^(3+)` with four monodentate lignads `L_(1), L_(2), L_(3)` and `L_(4)` absorb wavelengths in the region of red, green, yellow and blue respectively. The increasing order of ligand strength of the four ligands is -

A

`L_(1)ltL_(2) lt L_(4) lt L_(3)`

B

`L_(4) ltL_(3) lt L_(2) ltL_(1)`

C

`L_(1) lt L_(3) lt L_(2) lt L_(4)`

D

`L_(3) lt L_(2) lt L_(4) lt L_(1)`

Text Solution

Verified by Experts

The correct Answer is:
C
We know that the order of wavelength `(lambda)` of visible light is `"red"gt"yellow"gt"green"gt"blue."` According to the spectrochemical series, more the absorption frequency, stronger is the ligand.
`therefore` Strength of lignads `prop (1)/(lambda)`. Hence, the increasing order of ligand strength is, `L_(1)lt L_(3) lt L_(2) lt L_(4)`.
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