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Saturday, 31 October

JEE Main 2022 · ChemistryNumerical answerNumerical valueMediumCalculation

JEE Main 28 June 2022, Shift 2, Chemistry Q83

Question 83 of 90 in this shift, Chemistry question 23 of 30, Section B.

2.5 g of protein containing only glycine (C2H5NO2\mathrm{C_2H_5NO_2}) is dissolved in water to make 500 mL of solution. The osmotic pressure of this solution at 300 K is found to be 5.03×10−35.03\times10^{-3} bar. The total number of glycine units present in the protein is __________ . (Given : R=0.083 L bar K−1^{-1} mol−1^{-1})

Official answer

330

NTA final key.

Chapter
Solutions
Topic
Colligative Properties
Idea tested
Osmometry for Macromolecule Molar Mass

Same idea in other shifts

Asked 2× in all
  1. 5 Apr 2026, Shift 2 · Q7320 g hemoglobin in a 1 L aqueous solution (A) at 300 K is separated from pure water by semi permeable membrane. At equilibrium the height…MediumNumerical value

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 108 of the 174 JEE Main shifts held from 2017 to 2026.