Explainwhycompounds of Cu^(2+) arecolouredbutthoseof Zn^(2+) arecolour – InterviewSolution

1.	Explainwhycompounds of Cu^(2+) arecolouredbutthoseof Zn^(2+) arecolourless.
Answer» Solution :Thecompoundsof `CU^(2+)` are colouredas it has ONE freeelectronitsvalenceshellwhichabsorbradiationofvisibleregionand getexcitedto emititscomplementarycolour. Zn hasno FREE ELECTRON it has fully FILLES shells Dueto extrastable orbitalselectroncan'tbeexcitedby radiations ofvisiblelighthenceits compoundsare colourless.

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