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If the equivalent weight of the metal is 12 then the equivalent weight of its oxide is .

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Equivalent weight of metal oxide= equivalent weight of metal+ equivalent weight of oxygen
=12+8
Since, equivalent weight of oxygen= 8 g/mol
and equivalent weight of the metal is 12 g/mol…given

Therefore, Equivalent weight of metal oxide= 20g/mol

Final Answer:
Hence, the correct answer is 20g/mol

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