Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
AP EAMCET201922 Apr 2019Morning ShiftChemistryp Block Elements (Group 15, 16, 17 & 18)Actual

Which one of the following statements is not correct regarding phosphine?

Options

  1. AIt is a weak base
  2. BIt reacts with ( CuSO ₄ ) solution to form ( CuHPO ₄ )
  3. CIt is formed by the reaction of ( Ca ₃ P ₂ ) with ( HCl )
  4. DIt is used in smoke screeens

Correct answer

B. It reacts with ( CuSO ₄ ) solution to form ( CuHPO ₄ )

Step-by-step solution

Phosphine gives a black precipitate of cupric phosphide, when passed through ( CuSO ₄ ) solution. (3 CuSO ₄+2 PH ₃ Cu ₃ P ₂+3 H ₂ SO ₄ ) ( PH ₃ ) is a weak base. It is prepared by as follows : ( Ca ₃ P ₂+6 HCl 2 PH ₃+3 CaCl ₂ ) ( PH ₃ ) is used in smoke screens. Hence, option (b) is incorrect. While other options are correct.

Practice p Block Elements (Group 15, 16, 17 & 18) on Quantrex Academy →

More from p Block Elements (Group 15, 16, 17 & 18)

Which among the following is NOT in accordance with the property stated against it? 2026Complete hydrolysis of Xenon hexafluoride gives HF along with compound X. The hybridisation in X is 2025Orthophosphorus acid on disproportionation gives PH ₃ and another oxoacid of phosphorus ' X '. The basicity of X is 2025Observe the following P ₄+ SOCl ₂ Products P ₄+ SO ₂ Cl ₂ Products In both the reactions, a common product ' x ' is obtained. The number of lone pair of elecrons on the central ato 2025The number of P = O , P - P bonds present in oxoacid of phosphorus, prepared by treating red P ₄ with alkali are respectively 2025Which of the following is not correct? 2025Nature of two oxides of nitrogen X and Y formed in the reaction of sodium nitrite with hydrochloric acid is 2025Which of the following is not correct ? 2025 Full p Block Elements (Group 15, 16, 17 & 18) list All AP EAMCET PYQs