COMEDK · Chemistry · 22. p Block Elements (Group 15, 16, 17 & 18)
Given are \(\mathrm{H}_3 \mathrm{PO}_2, \mathrm{H}_3 \mathrm{PO}_3, \mathrm{H}_3 \mathrm{PO}_4\) and \(\mathrm{H}_4 \mathrm{P}_2 \mathrm{O}_7\). Which of the above oxacids results into two series of salts?
- A \(\mathrm{H}_3 \mathrm{PO}_2\)
- B \(\mathrm{H}_3 \mathrm{PO}_3\)
- C \(\mathrm{H}_3 \mathrm{PO}_4\)
- D \(\mathrm{H}_4 \mathrm{P}_2 \mathrm{O}_7\)
Answer & Solution
Correct Answer
(B) \(\mathrm{H}_3 \mathrm{PO}_3\)
Step-by-step Solution
Detailed explanation
Phosphorus acid \(\left(\mathrm{H}_3 \mathrm{PO}_3\right)\) is a diprotic acid. If forms two series of salts such as \(\mathrm{NaH}_2 \mathrm{PO}_3\) and \(\mathrm{Na}_2 \mathrm{HPO}_3\) but none of the type \(\mathrm{NaPO}_3\) with \(\mathrm{NaOH}\). Its structure is as
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