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ChemistryNEET 2025Valence bond and crystal field theory

Coordination Compounds

The correct order of the wavelength of light absorbed by the following complexes is:

A. · B. · C. · D.

Choose the correct answer from the options given below:

  1. A.B < D < A < C
  2. B.B < A < D < C✓
  3. C.C < D < A < B
  4. D.C < A < D < B

Solution

Wavelength absorbed is inversely related to . (strongest field) gives the largest splitting, then ; with water splits less, and with water least (absorbs in the red, ~800 nm). So B < A < D < C.

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