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The oxide that shows magnetic property is:
Option: 1 Mn3O4
Option: 2 SiO2
Option: 3 Na2O
Option: 4 MgO

Answers (1)

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\mathrm{Mn_3O_4} exists as \mathrm{MnO.Mn_2O_3} and is paramagnetic

The oxidation state of \mathrm{Mn} in \mathrm{Mn_3O_4} is +2 and +3.

Both \mathrm{Mn^{2+}} and \mathrm{Mn^{3+}} contain unpaired electrons and are paramagnetic

\mathrm{M n^{2+}-[A r] 3 d^{5} 4 s^{0}}

\mathrm{M n^{3+}-[A r] 3 d^{4} 4 s^{0}}

All other oxides are diamagnetic due to absence of unpaired electrons.

Therefore, the Correct option is (1)

Posted by

Kuldeep Maurya

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