Question

Among the four complexes of in which is attracted by magnetic

Answer 1

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➡There are four complexes of Ni. Select the complex(es) which will be attracted by magnetic field.
(I) [Ni(CN)4]2−[Ni(CN)4]2− (II) [NiCl4]2−[NiCl4]2− (III) Ni(CO4)Ni(CO4) (IV) [Ni(H2O)6]2+[Ni(H2O)6]2+ 

A

I only

B

IV only

C

II, III and IV

D

II and IV

⏩Solution

Paramagnetic complexes will be attracted by the magnetic field.
[NiCl4]2−[NiCl4]2− and [Ni(H2O)6]2+[Ni(H2O)6]2+contain 2 unpaired electrons each. Thus they are paramagnetic and will be attracted by the magnetic field.
In [Ni(CN)4]2−[Ni(CN)4]2− and Ni(CO4)Ni(CO4), all the electrons are paired. Hence, they are diamagnetic substances and are not attracted by the magnetic field.


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