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The P-Block Elements

Question
CBSEENCH12010480

What happens when
H3PO3 is heated?

Solution

Phosphorous acid H3PO3, on heating, undergoes disproportionation reaction to form Phosphine (PH3) and Phosphoric acid (H3PO4)
4H3PO3 +heat → 3H3PO4 +PH3