MHT CET Chemistry question

Cuprous ion is colourless, while cupric ion is coloured because

(A)both have unpaired electrons in the d-subshell
(B)cuprous ion has a complete d-subshell and cupric ion has an incomplete d-subshellCorrect
(C)both have half-filled p - and d-subshell
(D)cuprous ion has incomplete d-subshell and cupric ion has a complete d-subshell

Answer: (B)

Solution

Cu is (complete d-subshell, no d-d transition, colourless) while Cu is (incomplete

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Question ID VK-074875