D-And F-Block Elements Ques 415

Question: Which of the following is paramagnetic

[Pb. CET 2000]

Options:

A) Ni++

B) Cu+

C) Zn++

D) Sc+++

Show Answer

Answer:

Correct Answer: A

Solution:

Elements or ions containing unpaired electrons are paramagnetic.

28Ni=[Ar] 3d84s2 ; Ni2+=[Ar] 3d84s0

Ni2+ Stage Because Ni2+ have 2 unpaired electrons in 3d subshell therefore it is paramagnetic.

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