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Saturday, 31 October

JEE Main 2024 · ChemistryMultiple choiceSingle correctMediumConceptual

JEE Main 6 April 2024, Shift 2, Chemistry Q73

Question 73 of 90 in this shift, Chemistry question 13 of 30, Section A.

The correct statement among the following, for a "chromatography" purification method is :
  1. (1)Non-polar compounds are retained at top and polar compounds come down in column chromatography.
  2. (2)RfR_f is an integral value.
  3. (3)Organic compounds run faster than solvent in the thin layer chromatographic plate.
  4. (4)RfR_f of a polar compound is smaller than that of a non-polar compound.Official answer

Official answer

Option 4

NTA final key.

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

Same idea in other shifts

Asked 3× in all
  1. 31 Jan 2024, Shift 1 · Q71'Adsorption' principle is used for which of the following purification method?EasySingle correct
  2. 28 Jul 2022, Shift 2 · Q48Given below are two statements : One is labelled as **Assertion A** and the other is labelled as **Reason R** **Assertion A** : Thin layer…EasyAssertion–reason

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.