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.
