Which one of the following is a trivalent anion ?
(A) Aluminum ion (B) Phosphide ion (C) Ferric ion (D) Calcium ion
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phosphide ion
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Answer:
B) Phosphate iron
Explanation:
phosphate, also ferric phosphate, is the inorganic compound with the formula FePO₄. Several related materials are known, including four polymorphs of FePO₄ and two polymorphs of the dihydrate FePO₄·(H₂O)₂. These materials find several technical applications as well as occurring in the mineral kingdom
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