JEE Main 2020 · ChemistryMultiple choiceSingle correctMediumConceptual

JEE Main 2 September 2020, Shift 1, Chemistry Q26

Question 26 of 75 in this shift, Chemistry question 1 of 25.

An 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 water, the rate at which water molecules :

(1)leaves the vapour increasesOfficial answer
(2)leaves the solution increases
(3)leaves the vapour decreases
(4)leaves the solution decreasesOfficial answer

Official answer

Options 1 and 4

NTA final key (Sep 2020): multiple options accepted. Either option scored full marks.

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

Same idea in other shifts

Asked 7× in all

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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.