Question

$H_{3}P{O}_2$ is the molecular formula of an acid of phosphorous. Its name and basicity respectively are

• A. phosphorous acid and 2
• B. hypophosphorous acid and 2
• C. hypophosphorous acid and one
• D. hypophosphoric acid and two

Answer 1

Answer: (C)

The name of $H_{3}P{O}_2$ is hypophosphorous acid when dissolve in water, it gives only one $H^{+}$, so its basicity is one.