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H3PO2 is the molecular formula of an acid of phosphorus. Its name and basicity respectively are

1. Phosphorus acid and two
2. Hypophosphorous acid and two
3. Hypophosphorous acid and one
4. Hypophosphoric acid and two

Correct answer: Hypophosphorous acid and one

Solution

H3PO2 is hypophosphorous acid, and it has only one replaceable hydrogen atom attached to oxygen, making its basicity one.

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