D-And F-Block Elements Ques 457

Question: Cuprous ion is colourless while cupric ion is coloured because

Options:

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 complete d-orbital and cupric ion has an incomplete d-orbital.

Show Answer

Answer:

Correct Answer: D

Solution:

In $ C{{u}^{+}}[ Ar ]3d^{10} $ there is no unpaired electron, $ C{{u}^{2+}}[ Ar ]3d^{9} $ contains one unpaired electron hence coloured.



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