JEE Main 2026 · ChemistryMultiple choiceSingle correctEasyCalculation

JEE Main 6 April 2026, Shift 1, Chemistry Q56

Question 56 of 75 in this shift, Chemistry question 6 of 25, Section A.

When 0.25 moles of a non-volatile, non-ionizable solute was dissolved in 1 mole of a solvent the vapor pressure of solution was

x

% of vapor pressure of pure solvent. What is

x

(1)50%
(2)60%
(3)70%
(4)80%Official answer

Official answer

Option 4

NTA final key.

Chapter: Solutions
Topic: Colligative Properties
Idea tested: Relative Lowering of VP

Same idea in other shifts

Asked 7× in all

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9 Apr 2024, Shift 2 · Q84The vapor pressure of pure benzene and methyl benzene at $27^\circ$ C is given as 80 Torr and 24 Torr, respectively. The mole fraction of…MediumNumerical value
6 Apr 2023, Shift 1 · Q85Mass of Urea ( $\mathrm{NH_2CONH_2}$ ) required to be dissolved in 1000 g of water in order to reduce the vapour pressure of water by 25% is…MediumNumerical value
2 Sep 2020, Shift 1 · Q26An open beaker of water in equilibrium with water vapour is in a sealed container. When a few grams of glucose are added to the beaker of…MediumSingle correct
6 Sep 2020, Shift 2 · Q43A set of solutions is prepared using 180 g of water as a solvent and 10 g of different non-volatile solutes A, B and C. The relative…EasySingle correct

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.