question_answer

Which pair of oxyacids of phosphorus contains \[HC\equiv C-C{{H}_{2}}-C\equiv CH\] bonds?

A)  \[NaOH\]

B)  \[{{104}^{o}}40\]

C)  \[{{103}^{o}}\]

D)  \[{{107}^{o}}\]

Correct Answer: C

Solution :

\[{{\mathbf{H}}_{\mathbf{3}}}\mathbf{P}{{\mathbf{O}}_{\mathbf{3}}}\] \[\Rightarrow \] \[H-O-\underset{O}{\overset{H}{\mathop{\underset{\downarrow }{\overset{|}{\mathop{P}}}\,}}}\,\overset{P-H\,bonds}{\mathop{-O-H\}}}\,\] \[{{\mathbf{H}}_{\mathbf{3}}}\mathbf{P}{{\mathbf{O}}_{\mathbf{2}}}\] \[\Rightarrow \]