Coordination Compounds 2 Question 26

####28. Among [Ni(CO)4],[NiCl4]2,[Co(NH3)4Cl2]Cl, Na3[CoF6],Na2O2 and CsO2, the total number of paramagnetic compounds is

(2016 Adv.)

(a) 2

(b) 3

(c) 4

(d) 5

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Answer:

Correct Answer: 28. (c)

Solution:

Compounds Hybridisation Unpaired
electron(s)
Magnetic
character
Ni(CO)4 sp3 No Diamagnetic
[NiCl4]2 sp3 two Paramagnetic
[Co(NH3)4Cl2]Cl sp3d2 No Diamagnetic
Na3[CoF6] sp3d2 three Paramagnetic
Na2O2 - No Diamagnetic
(O22)
CsO2 - One Paramagnetic
O2(superoxide
ion is
paramagnetic)


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