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Writing Chemical Formula

Formula of a ...

Question

Formula of a metallic oxide is MO. The formula of its phosphate will be

A

M₂(PO₄)₂

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B

M(PO₄)

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C

M₂PO₄

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D

M₃(PO₄)₂

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Solution

The correct option is D
M₃(PO₄)₂

Valency of metal is + 2 by formula MO so its phosphate would be $M_{3} (P O_{4})_{2}$ because valency of $P O_{4}$ is - 3.

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