D-And F-Block Elements Ques 108
Question: Which of the following has diamagnetic character
[Pb. CET 2003]
Options:
A) $ {{[NiCl_4]}^{2-}} $
B) $ {{[CoF_6]}^{3-}} $
C) $ {{[Fe{{(H_2O)}_6}]}^{2+}} $
D) $ {{[Ni{{(CN)}_4}]}^{2-}} $
Show Answer
Answer:
Correct Answer: D
Solution:
Ni in presence of $ C{{N}^{-}} $ $ [N{{i}^{2+}} $ in presence of $ C{{N}^{-}}=[Ar] $ As $ {{[Ni{{(CN)}_4}]}^{2-}} $ has no unpaired electron. It is diamagnetic.
