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Saturday, 31 October

JEE Main 2022 · ChemistryMultiple choiceAssertion–reasonEasyConceptual

JEE Main 28 July 2022, Shift 2, Chemistry Q48

Question 48 of 90 in this shift, Chemistry question 18 of 30, Section A.

Given below are two statements : One is labelled as **Assertion A** and the other is labelled as **Reason R** **Assertion A** : Thin layer chromatography is an adsorption chromatography. **Reason R** : A thin layer of silica gel is spread over a glass plate of suitable size in thin layer chromatography which acts as an adsorbent. In the light of the above statements, choose the *correct* answer from the options given below
  1. (1)Both A and R are true and R is the correct explanation of AOfficial answer
  2. (2)Both A and R are true but R is NOT the correct explanation of A
  3. (3)A is true but R is false
  4. (4)A is false but R is true

Official answer

Option 1

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. 6 Apr 2024, Shift 2 · Q73The correct statement among the following, for a "chromatography" purification method is :MediumSingle correct
  2. 31 Jan 2024, Shift 1 · Q71'Adsorption' principle is used for which of the following purification method?EasySingle correct

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.