A) \[{{H}_{3}}P{{O}_{2}}\]
B) \[{{H}_{3}}P{{O}_{4}}\]
C) \[{{H}_{4}}{{P}_{2}}{{O}_{7}}\]
D) \[{{H}_{3}}P{{O}_{3}}\]
Correct Answer: B
Solution :
\[{{H}_{3}}P{{O}_{4}}\] is tribasic acid.
As it contains three replaceable hydrogens.
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