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Saturday, 31 October

JEE Main 2023 · ChemistryMultiple choiceOtherMediumDiagram reading

JEE Main 6 April 2023, Shift 2, Chemistry Q76

Question 76 of 90 in this shift, Chemistry question 16 of 30, Section A.

From the figure of column chromatography given below, identify incorrect statements. A. Compound 'c' is more polar than 'a' and 'b' B. Compound 'a' is least polar C. Compound 'b' comes out of the column before 'c' and after 'a' D. Compound 'a' spends more time in the column Choose the correct answer from the options given below:

The figure, in words

Vertical chromatography column with three bands labelled a (top), b (middle), c (bottom, nearest the outlet/stopcock).
  1. (1)B, C and D only
  2. (2)A, B and C onlyOfficial answer
  3. (3)B and D only
  4. (4)A, B and D only

Official answer

Option 2

NTA final key.

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

Same idea in other shifts

Asked 2× in all
  1. 4 Apr 2024, Shift 2 · Q73The adsorbent used in adsorption chromatography is/are - A. silica gel B. alumina C. quick lime D. magnesia Choose the most appropriate…EasyOther

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. This question needs a figure we do not reproduce; it is described in words above. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.