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Among the species given below, the total number of diamagnetic species is____. H atom, NO2 monomer, O2^– (superoxide),

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Among the species given below, the total number of diamagnetic species is____. H atom, NO2 monomer, O2– (superoxide), dimeric sulphur in vapour phase,
Mn3O4, (NH4)2[FeCl4], (NH4)2[NiCl4], K2MnO4, K2CrO4

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Answer: (1)
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Paramagnetic: H, NO2 monomer  O2- (superoxide) , S2 (Vapour), [Mn3O4 is mixed oxide of Mn+2 and Mn+3], (NH4)2 [FeCl4], (NH4)2[NiCl4], K2MnO4
Diamagnetic: K2CrO4

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