Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEST2019Chemistryp Block Elements (Group 15, 16, 17 & 18)

Phosphorous forms different oxyacids such as, hypophosphorous acid ( H ₃ PO ₂ ) , orthophosphorous acid ( H ₃ PO ₃ ) and orthophosphoric acid ( H ₃ PO ₄ ) . Orthophosphorous acid on heating forms orthophosphoric acid, which on heating first forms pyrophosphoric acid ( H ₄ P ₂ O ₇ ) and on further heating forms polyphosphoric acid. The correct statement is

Options

  1. AAll oxyacids of phosphorous act as oxidising agents.
  2. BPolyphosphoric acid contains repeating PO ₃ units.
  3. CThe basicities of orthophosphorous and orthophosphoric acids are the same.
  4. DHeating of orthophosphorous acid is a disproportionation reaction.

Correct answer

D. Heating of orthophosphorous acid is a disproportionation reaction.

Step-by-step solution

No solution available.

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 NEST PYQs