A) A dibasic acid
B) A tribasic acid
C) monobasic
D) neutral
Correct Answer: A
Solution :
The structure of phosphorous acid\[({{H}_{3}}P{{O}_{3}})\]is as follows: \[HO-\underset{\begin{smallmatrix} | \\ H \end{smallmatrix}}{\overset{\begin{smallmatrix} O \\ |\,\,| \end{smallmatrix}}{\mathop{P}}}\,-OH\] As it has\[2-OH\]groups, hence it shows dibasic character.
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