Given that the energy of the photons of different colours d…

Chemistry Co-ordinatios Compounds General Single Correct MCQ

Published on: August 14, 2026

Given that the energy of the photons of different colours decreases in the order of V I B G Y O R (Violet > Indigo > Blue > Green > Yellow > Orange > Red) and that if complex absorbs a photon of low energy then it shows colour of high energy photon. If an ion, M 2+ , forms the complexes [M(H 2 O) 6 ] 2+ , [MBr 6 ] 4– , and [M(en) 3 ] 2+ . The colours of the complexes, though not necessarily in order, are green, red, and blue. Match the complexes with the appropriate colour.

[MBr 6 ] 4– blue, [M(H 2 O) 6 ] 2+ green , [M(en) 3 ] 2+ red

[MBr 6 ] 4– green, [M(H 2 O) 6 ] 2+ blue , [M(en) 3 ] 2+ red

[MBr 6 ] 4– green, [M(H 2 O) 6 ] 2+ red , [M(en) 3 ] 2+ blue

[MBr 6 ] 4– red, [M(H 2 O) 6 ] 2+ green , [M(en) 3 ] 2+ blue

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The correct answer is:

Order of crystal field splitting en > H 2 O > Br – so, more stronger ligand will absorb lower wavelength light and reflect back higher wavelength light.

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