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An element M is in group 13th of the periodic table, the formula for its oxide is
MO
M2O3
M3O2
None of these
As the element M belongs to group 13th of the periodic table so it has 3 valence electrons, i.e., it can have +3 oxidation state while oxygen atom (with 2 valency) has −2 oxidation state. So the formula for the corresponding oxide is M2O3.
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