Chemistry Co-ordinatios Compounds Crystal Field Theory & Applications of Crystal Field Theory Single Correct MCQ
Published on: August 12, 2026

[Sc(H 2 O) 6 ] 3+ ion is :

A
coloured and paramagnetic
B
colourless and paramagnetic
C
colourless and diamagnetic
D
coloured and octahedral

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Verified by Experts
The correct answer is:
C

The electron configuration of 21 Sc +3 is [Ar] 18 3d 0 4s 0 . All electrons are paired and thus diamagnetic. As there is no unpaired electron in d-orbital, therefore, there is no d-d transition of electron. So according to crystal field theory the compound is colourless.

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