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.



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