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Question

Among [Ni(CO)4], [NiCl4]2−, [Co(NH3)4Cl2]Cl, Na3[CoF6], Na2O2 and CsO2, the total number of paramagnetic compounds are:

A
2
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B
3
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C
4
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D
5
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Solution

The correct option is B 3
Compound/Ion Magnetic nature of the
compound
[NiCO4] Diamagnetic
[NiCl4]2 Paramagnetic
[Co(NH3)4Cl2]Cl Diamagnetic
Na3[CoF6] Paramagnetic
Na2O2 Diamagnetic
CsO2 Paramagnetic
The number of paramagnetic compounds is 3.

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