JEE Main 2023 · ChemistryNumerical answerNumerical valueMediumCalculation

JEE Main 6 April 2023, Shift 1, Chemistry Q85

Question 85 of 90 in this shift, Chemistry question 25 of 30, Section B.

Mass 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 ________ g. (Nearest integer) Given: Molar mass of N, C, O and H are 14, 12, 16 and 1 g mol

^{-1}

respectively.

Official answer

1111

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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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.