D-And F-Block Elements Ques 364
Question: Which of the following ions is coloured
[BHU 1997]
Options:
A) $ C{{u}^{+}} $
B) $ C{{u}^{2+}} $
C) $ T{{i}^{4+}} $
D) $ {{V}^{5+}} $
Show Answer
Answer:
Correct Answer: B
Solution:
$ C{{u}^{2+}},\to ,3d^{9}4s^{0} $ 1 unpaired $ {{e}^{-}} $ .