D-And F-Block Elements Ques 181

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

[EAMCET 1992; BHU 2002]

Options:

A) Both have unpaired electrons in $ d $ -orbital

B) Cuprous ion has a completed $ d $ -orbital and cupric ion has an incomplete $ d $ -orbital

C) Both have half-filled $ p $ and $ d $ -orbitals

D) Cuprous ion has incomplete $ d $ -orbital and cupric ion has a completed $ d $ -orbital

Show Answer

Answer:

Correct Answer: B

Solution:

Cuprous ion $ (C{{u}^{+}}) $ $ 3d^{10} $ Completely filled d sub shell Cupric ion $ C{{u}^{+2}} $ One unpaired electron



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