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Saturday, 31 October

JEE Main 2023 · ChemistryMultiple choiceDiagram basedMediumConceptual

JEE Main 11 April 2023, Shift 2, Chemistry Q74

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

Compound from the following that will not produce precipitate on reaction with AgNO3\mathrm{AgNO_3} is :

The figure, in words

Each option is a structure drawn as a skeletal formula; see options.
  1. (1)[figure: benzyl bromide, benzene ring with a CH2 group bearing Br (C6H5-CH2-Br)]
  2. (2)[figure: benzene ring bonded to CH=CH-CH2-Br]
  3. (3)[figure: cyclopropene ring (triangle with a double bond along one side) with Br attached to the apex carbon opposite the double bond]
  4. (4)[figure: cyclohexene ring with Br attached to a double-bonded ring carbon (vinylic bromide)]Official answer

Official answer

Option 4

NTA final key.

Chapter
Haloalkanes and Haloarenes
Topic
SN1 and SN2 Mechanisms
Idea tested
Inertness of Vinylic and Aryl Halides

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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.