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Saturday, 31 October

JEE Main 2021 · ChemistryMultiple choiceDiagram basedMediumApplication

JEE Main 31 August 2021, Shift 2, Chemistry Q44

Question 44 of 90 in this shift, Chemistry question 14 of 30, Section A.

For the reaction given below : [benzene ring drawn with an inner circle; CHO attached at top, CH2OH\mathrm{CH_2OH} attached at bottom] 1. NaOH, Δ\Delta 2. H3O+\mathrm{H_3O^+} -> Product The compound which is not formed as a product in the reaction is a :

The figure, in words

Benzene ring (drawn with inner circle) with CHO at the top and CH2OH at the bottom (para positions); arrow with 1. NaOH, Δ 2. H3O+ to 'Product'.
  1. (1)diol
  2. (2)dicarboxylic acidOfficial answer
  3. (3)compound with both alcohol and acid functional groups
  4. (4)monocarboxylic acid

Official answer

Option 2

NTA final key.

Chapter
Aldehydes, Ketones and Carboxylic Acids
Topic
Aldol and Cannizzaro
Idea tested
Cannizzaro Reaction

Same idea in other shifts

Asked 5× in all
  1. 30 Jan 2024, Shift 2 · Q78m-chlorobenzaldehyde on treatment with 50% KOH solution yieldsEasyDiagram basedHas a figure
  2. 28 Jun 2022, Shift 1 · Q74The correct structure of product ‘A’ formed in the following reaction,…MediumDiagram basedHas a figure
  3. 4 Aug 2021, Shift 2 · Q45Cannizzaro reaction cannot be given byEasyOtherHas a figure
  4. 3 Sep 2020, Shift 2 · Q44The compound A in the following reactions is : A…HardDiagram basedHas a figure

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.