A) both have half filled p and d-orbitals
B) cuprous ion has incomplete d-orbital and cupric ion has a complete \[d-\]orbital
C) both have unpaired electrons in the d-orbitals
D) cuprous ion has a complete d-orbital and cupric ion has an incomplete \[d-\]orbital
Correct Answer: D
Solution :
Cuprous ion is colourless while cupric ion is coloured because cuprous ion has a complete d-orbital and cupric ion has an incomplete \[d-\]orbitals.
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