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Saturday, 31 October

JEE Main 2022 · ChemistryMultiple choiceDiagram basedEasyApplication

JEE Main 30 July 2022, Shift 2, Chemistry Q45

Question 45 of 90 in this shift, Chemistry question 15 of 30, Section A.

[figure: six-membered ring with three alternating double bonds bearing Br (printed Br); long arrow; six-membered ring with three alternating double bonds bearing COOH (printed COOH)] For the above conversion, the correct sequential addition of reagents is-

The figure, in words

Arrow with no reagents printed; left drawing: six-membered ring with three alternating double bonds and Br; right drawing: same ring with COOH.
  1. (1)(i) Mg (ii) CO2\mathrm{CO_2}, dry ether (iii) H2O\mathrm{H_2O}Official answer
  2. (2)(i) NaOH (ii) C2H5OH\mathrm{C_2H_5OH} (iii) HCl
  3. (3)(i) NaCN (ii) H2O\mathrm{H_2O} (iii) HCl
  4. (4)(i) KMnO4\mathrm{KMnO_4} (ii) HCl

Official answer

Option 1

NTA final key.

Chapter
Haloalkanes and Haloarenes
Topic
Carboxylic Acids and Derivatives
Idea tested
Carboxylic Acid Synthesis via Grignard and CO2

Same idea in other shifts

Asked 4× in all
  1. 2 Apr 2025, Shift 2 · Q68Consider the following reactions. From these reactions which reaction will give carboxylic acid as a major product ? (A)…MediumOtherHas a figure
  2. 26 Aug 2021, Shift 1 · Q48The correct sequential addition of reagents in the preparation of 3-nitrobenzoic acid from benzene is :MediumSingle correct
  3. 27 Aug 2021, Shift 2 · Q42Which one of the following reactions will not yield propionic acid ?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. 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.