AP EAMCET · Chemistry · p Block Elements (Group 15, 16, 17 & 18)
White phosphorus is heated with concentrated \(\mathrm{NaOH}\) in \(\mathrm{CO}_2\) atmosphere to form a gas \(A\) and compound \(B\). When \(A\) is bubbled into aqueous \(\mathrm{CuSO}_4\) solution copper phosphide and \(C\) are formed, \(B\) and \(C\) are respectively
- A \(\mathrm{PH}_3, \mathrm{H}_2 \mathrm{SO}_4\)
- B \(\mathrm{NaH}_2 \mathrm{PO}_2, \mathrm{H}_2 \mathrm{SO}_4\)
- C \(\mathrm{NaHPO}_2, \mathrm{CuS}\)
- D \(\mathrm{NaH}_2 \mathrm{PO}_2, \mathrm{Cu}_2 \mathrm{~S}\)
Answer & Solution
Correct Answer
(B) \(\mathrm{NaH}_2 \mathrm{PO}_2, \mathrm{H}_2 \mathrm{SO}_4\)
Step-by-step Solution
Detailed explanation
(i) When white phosphorus is heated with concentrated \(\mathrm{NaOH}\) in inert atmosphere of \(\mathrm{CO}_2\), it gives \(\mathrm{PH}_3(g)\) and \(\mathrm{NaH}_2 \mathrm{PO}_2\) as follows :…
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