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Saturday, 31 October

JEE Main 2020 · ChemistryMultiple choiceDiagram basedMediumApplication

JEE Main 4 September 2020, Shift 1, Chemistry Q40

Question 40 of 75 in this shift, Chemistry question 15 of 25.

The IUPAC name of the following compound is :

The figure, in words

Five-membered ring. CH3 is on a top vertex; C(=O)OH (printed as O over C-OH) is on the adjacent right vertex; Br is on the lower-left vertex.
  1. (1)3-Bromo-5-methylcyclopentanoic acid
  2. (2)4-Bromo-2-methylcyclopentane carboxylic acidOfficial answer
  3. (3)3-Bromo-5-methylcyclopentane carboxylic acid
  4. (4)5-Bromo-3-methylcyclopentanoic acid

Official answer

Option 2

NTA final key (Sep 2020).

Chapter
Organic Chemistry: Some Basic Principles and Techniques
Topic
IUPAC Nomenclature
Idea tested
Special Suffixes for Ring-Attached Functional Groups

Same topic in other shifts

All IUPAC Nomenclature questions
  1. 2 Apr 2026, Shift 1 · Q65In IUPAC nomenclature, the correct order of decreasing priority of functional group is :EasySingle correct
  2. 3 Apr 2025, Shift 2 · Q66What is the correct IUPAC name of [structure] ?EasyDiagram basedHas a figure
  3. 4 Apr 2025, Shift 2 · Q64The IUPAC name of the following compound is : HC≡C−CH2−CH(OH)−CH2−CH=CH2\mathrm{HC\equiv C-CH_2-CH(OH)-CH_2-CH=CH_2}MediumSingle correct
  4. 7 Apr 2025, Shift 1 · Q65Which of the following is the correct IUPAC name of given organic compound (X)?EasySingle correctHas a figure
  5. 8 Apr 2025, Shift 2 · Q63What is the correct IUPAC name of [structure: cyclopentene ring with an ethyl group on one ring carbon and an OH group on another] ?MediumSingle correctHas a figure
  6. 5 Apr 2024, Shift 2 · Q73The correct nomenclature for the following compound is :MediumDiagram 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.