A) \[{{H}_{3}}P{{O}_{3}}\] is dibasic and reducing
B) \[{{H}_{3}}P{{O}_{3}}\] is dibasic and non-reducing
C) \[{{H}_{3}}P{{O}_{4}}\] is tribasic and reducing
D) \[{{H}_{3}}P{{O}_{3}}\] is tribasic and non-reducing
Correct Answer: A
Solution :
\[H-O-\underset{O}{\overset{H}{\mathop{\underset{\downarrow }{\overset{|}{\mathop{P}}}\,}}}\,-OH\], hence it is dibasic. It acts as reducing agent also.
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