The colour of the coordination compounds depends on the crystal field splitting. What will be the correct order of absorption of wavelength of light in the visible region, for the complexes, [Co(NH3)6]3+, [Co(H2O)6]3+.
A: [Co(H2O)6]3+ > [Co(NH3)6]3+ > [Co(H2O)6]3+ .
B: [Co(NH3)6]3+ > [Co(H2O)6]3+ > [Co(CN)6]3-
C: [Co(H2O)6]3+ > [Co(NH3)6]3+ > [Co(CN)6]3-
D: [Co(CN)6]3- > [Co(NH3)6]3+ > [Co(H2O)6]3+
The colour of the coordination compounds depends on the crystal field splitting. What will be the correct order of absorption of wavelength of light in the visible region, for the complexes, [Co(NH3)6]3+, [Co(H2O)6]3+.
A: [Co(H2O)6]3+ > [Co(NH3)6]3+ > [Co(H2O)6]3+ .
B: [Co(NH3)6]3+ > [Co(H2O)6]3+ > [Co(CN)6]3-
C: [Co(H2O)6]3+ > [Co(NH3)6]3+ > [Co(CN)6]3-
D: [Co(CN)6]3- > [Co(NH3)6]3+ > [Co(H2O)6]3+
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1 Answer
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This is a Multiple Choice Questions as classified in NCERT Exemplar
Ans: Correct option: A
Strong field ligands have five degenerate energy levels, which means they have more energy separation than weak field ligands.
Here, ΔE=
ΔE α
α
The wavelength decreases as the energy separation rises.
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