Question

Which among the oxoacids of phosphorus contain two P – OH bonds, one P = O and one P – H bond

Options

• H₃PO₂

• H₃PO₃

• H₃PO₄

• H₄P₂O₇

Answer 1

H₃PO₃ 

Explanation:

H₃PO₃ ortho phosphoric acid

\[\begin{array}{cc}
\phantom{}\ce{O}\\
\phantom{}||\\
\phantom{.......}\ce{P - OH}\\
\phantom{}/\phantom{..}\backslash\\
\phantom{..}\ce{H}\phantom{....}\ce{OH}\phantom{}
\end{array}\]

P = O, one P – H, 2 P – OH bonds.