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  4. Cuprous ion is colourless while cupric ion is coloured because

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Q. Cuprous ion is colourless while cupric ion is coloured because

BHUBHU 2011

Solution:

Cuprous ion has completed d-orbital $ (3{{d}^{10}}) $ hence it is colourless, while cupric ion has incomplete d-orbital $ (3{{d}^{9}}) $ and therefore, it is coloured. Cuprous ion $ (3{{d}^{10}}): $ Cupric ion $ (3{{d}^{9}}): $

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