Question

Why compounds of cu2+ are coloured but zn2+ are courless?

Answer 1

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Answer 2

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#Reason why compounds of cu2+ are coloured :-

=>$Cu^2^+$ Are colored Because $Cu^2^+$ has incompletely filled d-orbitals $(3d^9)$ ,therefore d-d transition is possible in  $Cu^2^+$, Which imparts color to copper

#Reason why compounds of Zn2+ are coloured :-

=>$Zn^2^+$ Are incolored Because $Zn^2^+$ has incompletely filled d-orbitals $(3d^1^0)$