Question:
Which of the following oxoacids of phosphorus has two P-H bonds?
Which of the following oxoacids of phosphorus has two P-H bonds?
Show Hint
- Hypophosphorous acid (\(H_3PO_2\)) is a monobasic acid due to a single P-OH bond.
- It acts as a strong reducing agent in chemical reactions.
- Other phosphorus acids like \(H_3PO_4\), \(H_4P_2O_6\), and \(H_4P_2O_7\) do not have P-H bonds.
Updated On: May 4, 2026
- Hypophosphoric acid
- Orthophosphoric acid
- Pyrophosphoric acid
- Hypophosphorous acid
Show Solution
Verified By Collegedunia
The Correct Option is D
Solution and Explanation
The question asks for the oxoacid of phosphorus that contains two P-H bonds. To identify the correct answer, let's analyze the given options:
- Hypophosphoric acid (H4P2O6): This acid has the structure: \text{H}_2\text{P}(\text{OH})_2-\text{O}-\text{H}_2\text{P}(\text{OH})_2, containing no P-H bonds.
- Orthophosphoric acid (H3PO4): This is commonly known as phosphoric acid and has the structure: \text{O=P(OH)}_3, containing no P-H bonds.
- Pyrophosphoric acid (H4P2O7): This acid is formed by the condensation of two molecules of phosphoric acid, with the structure: \text{HOPO}_2\text{OPO(OH)}_2, containing no P-H bonds.
- Hypophosphorous acid (H3PO2): This acid has the structure: \text{PH}_2\text{(OH)}\text{O}, containing two P-H bonds.
From the above analysis, only hypophosphorous acid (H3PO2) contains two P-H bonds. Therefore, the correct answer is hypophosphorous acid.
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