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JEE Main levelSingle correct optionDifficulty 2 of 3bn198

Barium hypophosphite is $Ba (H X_{2} PO X_{2}) X_{2}$ . With Ba = +2, H = +1 and O = $- 2$ , the oxidation number of P is

A $+ 5$
B $+ 1$
C $+ 3$
D $- 1$

Answer: B

Per formula unit:

2 + 4 (+ 1) + 4 (- 2) + 2 x = 0

, so

x = + 1

. P is +1 in hypophosphite.

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