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Saturday, 31 October

JEE Main 2022 · ChemistryMultiple choiceDiagram basedMediumApplication

JEE Main 28 June 2022, Shift 2, Chemistry Q73

Question 73 of 90 in this shift, Chemistry question 13 of 30, Section A.

The correct IUPAC name of the following compound is :

The figure, in words

Skeletal structure, left to right: a carbon bearing an O2N group (single bond) and a methyl line pointing up; then a carbon with a C=C double bond to the next carbon, which has a methyl line pointing up; then a C(=O) carbon (O drawn below); then a CH2 carbon; then a terminal carbon with =O (O drawn below) and an H (aldehyde group).
  1. (1)4-methyl-2-nitro-5-oxohept-3-enal
  2. (2)4-methyl-5-oxo-2-nitrohept-3-enal
  3. (3)4-methyl-6-nitro-3-oxohept-4-enalOfficial answer
  4. (4)6-formyl-4-methyl-2-nitrohex-3-enal

Official answer

Option 3

NTA final key.

Chapter
Organic Chemistry: Some Basic Principles and Techniques
Topic
IUPAC Nomenclature
Idea tested
Oxo vs Formyl Prefix for Aldehydes

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.