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Question
Which element from following forms colourless compounds in +2 oxidation state?
Options
Zn (Z = 30)
Cu (Z = 29)
Mn (Z = 25)
Co (Z = 27)
MCQ
Solution
Zn (Z = 30)
Explanation:
\[\ce{Zn^{2+} -> 3d^10}\] (No unpaired d-electron)
∴ Zn forms colourless compounds in +2 oxidation state.
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Properties of Lanthanoids
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