Question:medium
Which is the correct statement for the given acids ?
Which is the correct statement for the given acids ?
Updated On: Jun 15, 2026
- Phosphinic acid is a monoprotic acid while phosphonic acid is a diprotic acid
- Phosphinic acid is a diprotic acid while phosphonic acid is a monoprotic acid
- Both are triprotic acids
- Both are diprotic acids
Show Solution
The Correct Option is A
Solution and Explanation
To determine the correct statement for the given acids, we need to understand the acidic nature of phosphinic acid and phosphonic acid:
- Phosphinic Acid: Also known as hypophosphorous acid, its chemical formula is H3PO2. In phosphinic acid, only one hydrogen atom is ionizable, making it a monoprotic acid. The structure supports this, as only one hydrogen is attached directly to the oxygen and can be released as an H+ ion.
- Phosphonic Acid: The chemical formula for phosphonic acid is H3PO3. It is a diprotic acid because it can donate two protons (H+ ions). In its structure, two hydrogen atoms are directly bonded to oxygen atoms and are ionizable.
Based on the above information:
- Monoprotic Acid: An acid that can donate only one proton.
- Diprotic Acid: An acid that can donate two protons.
Thus, the correct statement is: Phosphinic acid is a monoprotic acid while phosphonic acid is a diprotic acid.
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