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Question
Which cation from following does NOT form colourless compound?
(Atomic number - Cu = 29, Ti = 22, Zn = 30, Sc = 21)
Options
Ti3+
Cu1+
Sc3+
Zn2+
MCQ
Solution
Ti3+
Explanation:
Ti3+ = 4s0 3d1
Cu1+ = 4s0 3d10
Sc3+ = 4s0 3d0
Zn2+ = 4s0 3d10
Ti3+ forms colored compounds as it has unpaired electrons.
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Common Properties of d Block Elements
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