A) \[{{H}_{3}}P{{O}_{4}}\]
B) \[{{H}_{4}}{{P}_{2}}{{O}_{7}}\]
C) \[{{H}_{4}}{{P}_{2}}{{O}_{5}}\]
D) \[{{H}_{3}}P{{O}_{4}}\]
Correct Answer: B
Solution :
Pyrophosphoric acid \[({{H}_{4}}{{P}_{2}}{{O}_{7}})\]obtained by condensing two molecules of\[{{H}_{3}}P{{O}_{4}}\]by losing one \[{{H}_{2}}O\] molecule, contains one \[P-O-P\] bond, four \[P-OH\] bonds and two \[P=O\] bonds.
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