Q.

Oxidation state of metal is ‘+3’ for at least one metal atom in all the following except

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a

Fe2O3

b

Mn3O4

c

Pb3O4

d

Fe3O4

answer is C.

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Detailed Solution

Pb3O4 is a mixed oxide. Pb3O4 is Pb+4O2.Pb+2O ;
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