Question

Identify the compound, in which phosphorus exists in the oxidation state of + 1.

विकल्प

• Phosphonic acid \[\ce{H3PO3}\]

• Phosphinic acid \[\ce{H3PO2}\]

• Pyrophosphorus acid \[\ce{H4P2O5}\]

• (d) Orthophosphoric acid \[\ce{H3PO4}\]

Answer 1

Phosphinic acid \[\ce{H3PO2}\]

Explanation:

\[\begin{array}{cc}\ce{O}\\||\\\ce{P}\\ /\phantom{...}|\phantom{...}\backslash\\\phantom{..} \ce{H}\phantom{...} \ce{OH}\phantom{..}\ce{OH} \end{array}\]	\[\begin{array}{cc}\ce{O}\\||\\\ce{P}\\ /\phantom{...}|\phantom{...}\backslash\\ \phantom{..}\ce{H}\phantom{...}\ce{H} \phantom{...}\ce{OH} \end{array}\]
Orthophosphorus acid or pbosphonic acid (H3PO3) Oxidation state : +3	Hypophosphorus acid or phosphinic acid (H3PO2) Oxidation state : + 1
\[\begin{array}{cc}\ce{O}\phantom{.........}\ce{O}\\||\phantom{.........}||\\ \ce{P}\phantom{.........}\ce{P}\\\phantom{.}/\phantom{...}|\phantom{...} \backslash\phantom{...}/\phantom{...}|\phantom{....}\backslash\\ \phantom{..}\ce{H}\phantom{...}\ce{OH}\phantom{..}\ce{O}\phantom{..} \ce{OH}\phantom{..}\ce{OH}\end{array}\]	\[\begin{array}{cc}\ce{O}\\||\\\ce{P}\\ /\phantom{...}|\phantom{...}\backslash\\\phantom{..} \ce{OH}\phantom{..} \ce{OH}\phantom{..}\ce{OH} \end{array}\]
Pyrophosphorus acid (H4P2O5) Oxidation state : +3	Orthophosphoric acid (H3PO4) Oxidation state : +5