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

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

A

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

B

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

C

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

D

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

Text Solution

Verified by Experts

The correct Answer is:
B
The energy increases in the order (VIBGYOR)
red < yellow < green < blue
The complex absorbing lower energy will be of lower strength of ligand and therefore, the correct order of ligand strength is
`L_(1) lt L_(3) lt L_(2) lt L_(4)`
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