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

Options

A. `M_2(PO_4)_2`
B. `M(PO_4)`
C. `M_2PO_4`
D. `M_3(PO_4)_2`

Answer

D

Explanation

Formula of metallic oxide ` = MO -= M^(2+) O^(2-)`
So its valency is +2.
Valency of phosphate ion is –3.
So formula of metal phosphate is `M^(2+) PO_4^(3-)` or `M_3 (PO_4)_2`.