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Saturday, 31 October

JEE Main 2021 · ChemistryMultiple choiceSingle correctMediumRecall

JEE Main 26 February 2021, Shift 2, Chemistry Q47

Question 47 of 90 in this shift, Chemistry question 17 of 30, Section A.

Seliwanoff test and Xanthoproteic test are used for the identification of __________ and __________ respectively.
  1. (1)aldoses, ketoses
  2. (2)ketoses, aldoses
  3. (3)ketoses, proteinsOfficial answer
  4. (4)proteins, ketoses

Official answer

Option 3

NTA final key.

Chapter
Biomolecules
Topic
Carbohydrates
Idea tested
Seliwanoff's Test

Same idea in other shifts

Asked 3× in all
  1. 27 Aug 2021, Shift 2 · Q40Which one of the following tests used for the identification of functional groups in organic compounds does not use copper reagent ?MediumSingle correct
  2. 2 Sep 2020, Shift 2 · Q41The correct observation in the following reactions is :…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.