AP EAMCET · Chemistry · p Block Elements (Group 15, 16, 17 & 18)
Which one of the following statements is not correct regarding phosphine?
- A It is a weak base
- B It reacts with \(\mathrm{CuSO}_4\) solution to form \(\mathrm{CuHPO}_4\)
- C It is formed by the reaction of \(\mathrm{Ca}_3 \mathrm{P}_2\) with \(\mathrm{HCl}\)
- D It is used in smoke screeens
Answer & Solution
Correct Answer
(B) It reacts with \(\mathrm{CuSO}_4\) solution to form \(\mathrm{CuHPO}_4\)
Step-by-step Solution
Detailed explanation
Phosphine gives a black precipitate of cupric phosphide, when passed through \(\mathrm{CuSO}_4\) solution. \(3 \mathrm{CuSO}_4+2 \mathrm{PH}_3 \longrightarrow \mathrm{Cu}_3 \mathrm{P}_2+3 \mathrm{H}_2 \mathrm{SO}_4\) \(\mathrm{PH}_3\) is a weak base. It is prepared by as follows…
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