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Saturday, 31 October

JEE Main 2021 · ChemistryMultiple choiceDiagram basedEasyDiagram reading

JEE Main 17 March 2021, Shift 1, Chemistry Q42

Question 42 of 90 in this shift, Chemistry question 12 of 30, Section A.

Which of the following is an aromatic compound ?

The figure, in words

All four options are drawn five-membered ring structures (skeletal, no atom letters), described in the options.
  1. (1)[figure: five-membered ring drawn as a pentagon with a double bond on the top edge and a double bond on the bottom edge, rightmost vertex bare, no charge]
  2. (2)[figure: five-membered ring drawn as a pentagon with a double bond on the top edge and a double bond on the bottom edge, rightmost vertex carrying a circled minus charge]Official answer
  3. (3)[figure: five-membered ring drawn as a pentagon with a double bond on the upper-left edge and a double bond on the bottom edge, upper-right vertex carrying a circled plus charge]
  4. (4)[figure: five-membered ring drawn as a pentagon with one double bond on the top edge, rightmost vertex carrying a circled minus charge and lower-left vertex carrying a circled minus charge]

Official answer

Option 2

NTA final key.

Chapter
Organic Chemistry: Some Basic Principles and Techniques
Topic
Aromatic Hydrocarbons
Idea tested
Huckel's Rule (4n+2)

Same idea in other shifts

Asked 8× in all
  1. 8 Apr 2026, Shift 2 · Q64The total number of aromatic compounds/species from the following is [figures: p-benzoquinone; tropylium cation (cycloheptatrienyl…MediumOtherHas a figure
  2. 2 Apr 2025, Shift 1 · Q65Designate whether each of the following compounds is aromatic or not aromatic.MediumSingle correctHas a figure
  3. 8 Apr 2024, Shift 2 · Q88Total number of aromatic compounds among the following compounds is ________.MediumNumerical valueHas a figure
  4. 27 Jan 2024, Shift 1 · Q89Among the given organic compounds, the total number of aromatic compounds is __________. (A) [figure] (B) [figure] (C) [figure] (D) [figure]MediumNumerical valueHas a figure
  5. 30 Jan 2024, Shift 1 · Q71Which of the following molecule/species is most stable ?MediumDiagram basedHas a figure
  6. 13 Apr 2023, Shift 2 · Q74Given below are two statements : Statement I : Tropolone is an aromatic compound and has 8 π\pi electrons. Statement II : π\pi electrons…HardTwo statements
  7. 28 Jun 2022, Shift 1 · Q72Which of the following structures are aromatic in nature ?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.