Question

Hypophosphorus acid $({{H}_{3}}P{{O}_{2}})$ is:

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

Answer 1

Answer: (D)

monobasic acid

Answer 2

Hypophosphorus acid $({{H}_{3}}P{{O}_{2}})$ is a monobasic acid as it gives only one type of salt $(Na{{H}_{2}}P{{O}_{2}})$ . ${{H}_{3}}P{{O}_{2}}\rightleftharpoons {{H}^{+}}+{{H}_{2}}PO_{2}^{-}$ 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