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Saturday, 31 October

JEE Main 2020 · ChemistryMultiple choiceOtherHardMulti-step

JEE Main 9 January 2020, Shift 1, Chemistry Q41

Question 41 of 75 in this shift, Chemistry question 16 of 25, Section A.

A chemist has 4 samples of artificial sweetener A, B, C and D. To identify these samples, he performed certain experiments and noted the following observations : (i) A and D both form blue-violet colour with ninhydrin. (ii) Lassaigne extract of C gives positive AgNO3\mathrm{AgNO_3} test and negative Fe4[Fe(CN)6]3\mathrm{Fe_4[Fe(CN)_6]_3} test. (iii) Lassaigne extract of B and D gives positive sodium nitroprusside test. Based on these observations which option is correct ?
  1. (1)A : Alitame; B : Saccharin; C : Aspartame; D : Sucralose
  2. (2)A : Aspartame; B : Saccharin; C : Sucralose; D : AlitameOfficial answer
  3. (3)A : Aspartame; B : Alitame; C : Saccharin; D : Sucralose
  4. (4)A : Saccharin; B : Alitame; C : Sucralose; D : Aspartame

Official answer

Option 2

NTA final key (Jan 2020).

Chapter
Chemistry in Everyday Life
Topic
Chemistry in Everyday Life
Idea tested
Artificial Sweetener Structural Properties and Stability

Same idea in other shifts

Asked 3× in all
  1. 8 Apr 2023, Shift 1 · Q78Match List I with List II: List I | List II A. Saccharin | I. High potency sweetener B. Aspartame | II. First artificial sweetening agent…EasyMatch the list
  2. 25 Jun 2022, Shift 1 · Q80Which one of the following is an example of artificial sweetner ?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.