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Saturday, 31 October

JEE Main 2020 · ChemistryMultiple choiceSingle correctEasyRecall

JEE Main 2 September 2020, Shift 2, Chemistry Q41

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

The correct observation in the following reactions is : Sucrose→Cleavage (Hydrolysis)Glycosidic bondA+B→Seliwanoff’s reagent?\mathrm{Sucrose} \xrightarrow[\text{Cleavage (Hydrolysis)}]{\text{Glycosidic bond}} \mathrm{A} + \mathrm{B} \xrightarrow{\text{Seliwanoff’s reagent}} ?
  1. (1)Formation of red colourOfficial answer
  2. (2)Formation of blue colour
  3. (3)Formation of violet colour
  4. (4)Gives no colour

Official answer

Option 1

NTA final key (Sep 2020).

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. 26 Feb 2021, Shift 2 · Q47Seliwanoff test and Xanthoproteic test are used for the identification of __________ and __________ respectively.MediumSingle 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.