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Identify the compound in which phosphoru...

Identify the compound in which phosphorus exists in the oxidation state of +1.

A

Phosphonic acid `(H_(3) PO_(3))`

B

Phosphinic acid `(H_(3)PO_(2))`

C

Pyrophosphorus acid `(H_(4)P_(2)O_(5))`

D

Orthophosphoric acid `(H_(3)PO_(4))`

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The correct Answer is:
B
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