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JEE Main levelSingle correct optionDifficulty 2 of 3bn102

The anion $H X_{2} PO X_{2} X^{-}$ (both H bonded to P) derives from hypophosphorous acid and is called hypophosphite. Using the hypo-/-ite system, name $Ba (H X_{2} PO X_{2}) X_{2}$ .

Abarium phosphite
Bbarium hypophosphate
Cbarium dihydrogenphosphate
Dbarium hypophosphite

Answer: D

Two

H X_{2} PO X_{2} X^{-}

ions balance

Ba X^{2 +}

. The ion is the hypophosphite of hypophosphorous acid

H X_{3} PO X_{2}

(P

+ 1

), so the salt is barium hypophosphite. The phosphite is

PO X_{3} X^{3 -}

and the phosphate

PO X_{4} X^{3 -}

.

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