D And F Block Elements Question 511
Question: Cuprous ion is colourless, while cupric ion is coloured because
[EAMCET 1992; BHU 2002]
Options:
A) Both have unpaired electrons in the $ d $-orbital
B) Cuprous ion has an incomplete $ d $ -orbital and cupric ion has a completed $ d $ -orbital
C) Both have half-filled $ p $ and $ d $ -orbitals
D) Cuprous ion has incomplete $ d $ -orbital and cupric ion has an incomplete $ 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
BETA
