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Saturday, 31 October

JEE Main 2021 · ChemistryMultiple choiceMatch the listEasyRecall

JEE Main 4 August 2021, Shift 2, Chemistry Q31

Question 31 of 90 in this shift, Chemistry question 1 of 30, Section A.

Match List-I with List-II : List-I : Examples of Colloids A. Paints B. Hair cream C. Whipped cream D. Cheese List-II : Type of Colloid I. Emulsion II. Gel III. Sol IV. Foam Choose the most appropriate answer from the options given below :

The figure, in words

Two-column table: List-I (Examples of Colloids) A-D and List-II (Type of Colloid) I-IV, as transcribed in the stem.
  1. (1)A-III, B-I, C-IV, D-IIOfficial answer
  2. (2)A-II, B-I, C-IV, D-III
  3. (3)A-IV, B-III, C-II, D-I
  4. (4)A-I, B-IV, C-III, D-II

Official answer

Option 1

NTA final key.

Chapter
Surface Chemistry
Topic
Colloids
Idea tested
Colloid Classification by State

Same idea in other shifts

Asked 6× in all
  1. 6 Apr 2023, Shift 2 · Q87The number of colloidal systems from the following, which will have 'liquid' as the dispersion medium, is ______________. Gem stones,…MediumNumerical value
  2. 27 Jun 2022, Shift 1 · Q64Match List - I with List - II. List - I (A) Lyophilic colloid (B) Emulsion (C) Positively charged colloid (D) Negatively charged colloid…EasyMatch the list
  3. 25 Jul 2021, Shift 2 · Q33Match List I with List II : List - I Example of Colloids (a) Cheese (b) Pumice stone (c) Hair cream (d) Cloud List - II Classification (i)…EasyMatch the list
  4. 17 Mar 2021, Shift 1 · Q32A colloidal system consisting of a gas dispersed in a solid is called a/an :EasySingle correct
  5. 4 Sep 2020, Shift 1 · Q26Match the following : (i) Foam (a) smoke (ii) Gel (b) cell fluid (iii) Aerosol (c) jellies (iv) Emulsion (d) rubber (e) froth (f) milkEasyMatch the list

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.