The correct statements related to oxoacids of phosphorous is(are)

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Upon heating, H3PO3 undergoes disproportionation reaction to produce H3PO4 and PH3 .

While H3PO3 can act as reducing agent, H3PO4 cannot.

H3PO3 is a monobasic acid.

The H atom of P−H bond in H3PO3 is not ionizable in water.

answer is A.

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Detailed Solution

(1) 4H3PO3→3H3PO4+PH3(2) H3PO3 is a reducing acid as it has P−H bond (3) H3PO3 is a dibasic acid (4) H3PO3+H2O⇌H3PO3−+H3O+H3PO3−+H2O⇌H3PO32−+H3O+

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