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Saturday, 31 October

JEE Main 2022 · ChemistryNumerical answerNumerical valueEasyCalculation

JEE Main 25 July 2022, Shift 2, Chemistry Q89

Question 89 of 90 in this shift, Chemistry question 29 of 30, Section B.

The separation of two coloured substances was done by paper chromatography. The distances travelled by solvent front, substance A and substance B from the base line are 3.25 cm, 2.08 cm and 1.05 cm, respectively. The ratio of Rf\mathrm{R_f} values of A to B is _______.

Official answer

2

NTA final key.

Chapter
Organic Chemistry: Some Basic Principles and Techniques
Topic
Adsorption
Idea tested
Adsorption Chromatography Principle

Same idea in other shifts

Asked 2× in all
  1. 11 Apr 2023, Shift 1 · Q72Thin layer chromatography of a mixture shows the following observation: The correct order of elution in the silica gel column…MediumDiagram basedHas a figure

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.