D-And F-Block Elements Ques 415
Question: Which of the following is paramagnetic
[Pb. CET 2000]
Options:
A) $ N{{i}^{++}} $
B) $ C{{u}^{+}} $
C) $ Z{{n}^{++}} $
D) $ S{{c}^{+++}} $
Show Answer
Answer:
Correct Answer: A
Solution:
Elements or ions containing unpaired electrons are paramagnetic.
$ _{28}Ni=[Ar]\ 3d^{8}4s_2^{{}} $ ; $ N{{i}^{2+}}=[Ar]\ 3d^{8}4s^{0} $
$ N{{i}^{2+}} $ Stage Because $ N{{i}^{2+}} $ have 2 unpaired electrons in 3d subshell therefore it is paramagnetic.
