Question

Hypophosphorus acid $(H_{3}P{O}_2)$ is:

• A. dibasic acid
• B. tribasic acid
• C. neutral
• D. monobasic acid

Answer 1

Answer: (D)

Hypophosphorus acid $(H_{3}P{O}_2)$ is a monobasic acid as it gives only one type of salt $(Na{H}_{2}P{O}_2)$ . $H_{3}P{O}_2\rightleftharpoons H^{+}+H_{2}P{O}_2^{-}$ In phosphorus oxy-acids, the H-atoms attached to O-atom, are ionisable while P?H bonded H-atoms are not ionisable and are reducing. Hypophosphorus acid contains only one ?OH group and have 2 (P?H) bonded H-atoms, as