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Saturday, 31 October

JEE Main 2022 · ChemistryMultiple choiceAssertion–reasonMediumConceptual

JEE Main 27 July 2022, Shift 1, Chemistry Q74

Question 74 of 90 in this shift, Chemistry question 14 of 30, Section A.

Given below are two statements: one is labelled as Assertion A and, the other is labelled as Reason R. Assertion A: [6] Annulene, [8] Annulene and cis-[10] Annulene, are respectively aromatic, not-aromatic and aromatic. [6] Annulene [8] Annulene cis - [10] Annulene Reason R: Planarity is one of the requirements of aromatic systems. In the light of the above statements, choose the most appropriate answer from the options given below.

The figure, in words

Three ring drawings under the printed captions: [6] Annulene is a six-membered ring with alternating double bonds drawn; [8] Annulene is an eight-membered ring with alternating double bonds drawn; cis - [10] Annulene is a ten-membered ring with alternating double bonds drawn and a small label H (with a second mark beneath it, printed like 'II') inside the ring.
  1. (1)Both A and R are correct and R is the correct explanation of A.Official answer
  2. (2)Both A and R are correct but R is NOT the correct explanation of A.
  3. (3)A is correct but R is not correct.
  4. (4)A is not correct but R is correct.

Official answer

Option 1

NTA final key.

Chapter
Hydrocarbons
Topic
Aromatic Hydrocarbons
Idea tested
Annulene Planarity and Aromaticity

Same idea in other shifts

Asked 3× in all
  1. 8 Apr 2024, Shift 1 · Q76Which of the following are aromatic? A. [figure: fused bicyclic ring system, two six-membered rings] B. [figure: benzene ring with a vinyl…MediumOtherHas a figure
  2. 26 Jul 2022, Shift 1 · Q73Which of the following compounds is not aromatic ?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.