question_answer

Which of the following does not contain P-O-P bond?

A)  Isohypophosphoric acid

B)  Diphosphorus acid

C)  Diphosphoric acid

D)  Hypophosphoric acid

Correct Answer: D

Solution :

Isohyposphoric acid \[({{H}_{4}}{{P}_{2}}{{O}_{6}})\] \[H-\underset{OH}{\mathop{\overset{O}{\mathop{\overset{||}{\mathop{\underset{|}{\mathop{P}}\,}}\,}}\,}}\,-O-\underset{OH}{\mathop{\overset{O}{\mathop{\overset{||}{\mathop{\underset{|}{\mathop{P}}\,}}\,}}\,}}\,-OH\] Diphosphorus acid \[({{H}_{4}}{{P}_{2}}{{O}_{5}})\] \[H-\underset{OH}{\mathop{\overset{O}{\mathop{\overset{||}{\mathop{\underset{|}{\mathop{P}}\,}}\,}}\,}}\,-O-\underset{OH}{\mathop{\overset{O}{\mathop{\overset{||}{\mathop{\underset{|}{\mathop{P}}\,}}\,}}\,}}\,-OH\] Diphosphoric acid \[({{H}_{4}}{{P}_{2}}{{O}_{7}})\]                 Hypophosphoric acid \[({{H}_{4}}{{P}_{2}}{{O}_{6}})\]