Q.

Which of the following set of species are paramagnetic? 

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a

ClO2,O3,NO2

b

ClO2,O2,NO2

c

O3,O2,P4

d

N2,B2,C2

answer is B.

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Detailed Solution

The presence of one or more unpaired electrons in a species is what causes para-magnetism. Only molecules with odd numbers of electrons, such as NO, NO2, and ClO2, which have one unpaired electron each, are typically paramagnetic.

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