Vapour pressure of a pure liquid from the total vapour pressure of its ideal solution
This type of question, asked 5 times: 28 Jul 2022, 24 Jan 2023, 2 Apr 2025, 23 Jan 2026 S2, 28 Jan 2026 S1. All 5 questions below, oldest first.
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Question 1
28 Jul 2022
144A gaseous mixture of two substances A and B, under a total pressure of is in equilibrium with an ideal liquid solution. The mole fraction of substance is 0.5 in the vapour phase and 0.2 in the liquid phase. The vapour pressure of pure liquid is___ atm. (Nearest integer)Question 2
24 Jan 2023
146The total pressure observed by mixing two liquids A and B is when their mole fractions are 0.7 and 0.3 respectively. The total pressure become if the mole fractions are changed to 0.2 and 0.8 respectively for and . The vapour pressure of pure ____is mm Hg. (Nearest integer) Consider the liquids and solutions behave ideally.Question 3
2 Apr 2025
32A solution is made by mixing one mole of volatile liquid with 3 moles of volatile liquid . The vapour pressure of pure A is 200 mm Hg and that of the solution is 500 mm Hg . The vapour pressure of pure B and the least volatile component of the solution, respectively, are :Tap an option to check your answer.
Question 4
23 Jan 2026 S2
47Two liquids A and B form an ideal solution. At 320 K, the vapour pressure of the solution, containing 3 mol of A and 1 mol of B is 500 mm Hg. At the same temperature, if 1 mol of A is further added to this solution, vapour pressure of the solution increases by 20 mm Hg. Vapour pressure (in mm Hg ) of B in the pure state is . (Nearest integer)Question 5
28 Jan 2026 S1
28At moles of liquid A and 3 moles of liquid are mixed. The vapour pressure of ideal solution formed is 320 mm Hg . At this stage, one mole of A and one mole of are added to the solution. The vapor pressure is now measured as 328.6 mm Hg . The vapour pressure (in mm Hg ) of A and B are respectively:Tap an option to check your answer.