Raoult's Law & Vapour Pressure: JEE Questions & Solutions
19 previous-year JEE Chemistry questions on Raoult's Law & Vapour Pressure, each with a worked step-by-step solution.
Previous-year questions
- 01
Given below are two statements: Statement I: The Henry’s law constant K_H is constant with respect to variations in solution concentration…
MCQEasyJEE 2026 - 02
Consider a solution of CO₂(g) dissolved in water in a closed container. Which one of the following plots correctly represents the variation…
MCQEasyJEE 2026 - 03
Which one of the following graphs accurately represents the plot of partial pressure of CS₂ vs its mole fraction in a mixture of acetone…
MCQEasyJEE 2026 - 04
Two 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…
NVAMediumJEE 2026 - 05
Two liquids A and B form an ideal solution at temperature T K. At T K, the vapour pressures of pure A and pure B are 55 kPa and 15 kPa…
MCQMediumJEE 2026 - 06
At 298 K, the mole percentage of N₂(g) in air is 80%. Water is in equilibrium with air at a pressure of 10 atm. What is the mole fraction…
MCQEasyJEE 2026 - 07
At temperature T K, 2 moles of liquid A and 3 moles of liquid B are mixed. The vapour pressure of the ideal solution formed is 320 mm Hg.…
MCQMediumJEE 2026 - 08
When a non-volatile solute is added to the solvent, the vapour pressure of the solvent decreases by 10 mm Hg. The mole fraction of the…
MCQEasyJEE 2025 - 09
Consider a binary solution of two volatile liquid components 1 and 2. x₁ and y₁ are the mole fractions of component 1 in the liquid and…
MCQMediumJEE 2025 - 10
A solution is made by mixing one mole of volatile liquid A with 3 moles of volatile liquid B. The vapor pressure of pure A is 200 mm Hg and…
MCQEasyJEE 2025 - 11
Liquid A and B form an ideal solution. The vapour pressure of pure liquids A and B are 350 mm Hg and 750 mm Hg respectively at the same…
MCQEasyJEE 2025 - 12
Match List-I with List-II | List-I | List-II | | --- | --- | | (A) Solution of chloroform and acetone | (I) Minimum boiling azeotrope | |…
MCQMediumJEE 2025 - 13
Which of the following binary mixture does not show the behavior of minimum boiling azeotropes?
MCQEasyJEE 2025 - 14
A solution of two miscible liquids showing negative deviation from Raoult’s law will have:
MCQEasyJEE 2024 - 15
The vapor pressure of pure benzene and methyl benzene at 27 °C is given as 80 Torr and 24 Torr, respectively. The mole fraction of methyl…
NVAEasyJEE 2024 - 16
The total pressure observed by mixing two liquids A and B is 350 mm Hg when their mole fractions are 0.7 and 0.3 respectively. The total…
NVAMediumJEE 2023 - 17
The vapour pressure versus temperature curve for a solution-solvent system is shown below. The boiling point of the solvent is ^°C.
NVAEasyJEE 2023 - 18
What weight of glucose must be dissolved in 100 g of water to lower the vapour pressure by 0.20 mmHg? (Assume dilute solution is being…
MCQEasyJEE 2023 - 19
The vapour pressure of 30% (w/v) aqueous solution of glucose is mm Hg at 25^°C. [Given: The density of 30% (w/v) aqueous solution of…
NVAMediumJEE 2023
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