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Saturday, 31 October

JEE Main 2020 · ChemistryMultiple choiceDiagram basedHardConceptual

JEE Main 4 September 2020, Shift 1, Chemistry Q41

Question 41 of 75 in this shift, Chemistry question 16 of 25.

The decreasing order of reactivity of the following organic molecules towards AgNO3\mathrm{AgNO_3} solution is :

The figure, in words

Four structures labelled (A)-(D). (A): three-membered ring with Cl on the top vertex and a short line drawn inside the triangle parallel to the base. (B): same ring as (A) with OMe on the lower-right vertex. (C): CH3CHCH3 with Cl below the middle C. (D): CH3CHCH2NO2 with Cl below the middle C.
  1. (1)(A) > (B) > (C) > (D)
  2. (2)(B) > (A) > (C) > (D)Official answer
  3. (3)(A) > (B) > (D) > (C)
  4. (4)(C) > (D) > (A) > (B)

Official answer

Option 2

NTA final key (Sep 2020).

Chapter
Haloalkanes and Haloarenes
Topic
SN1 and SN2 Mechanisms
Idea tested
Substrate Steric Effects

Same idea in other shifts

Asked 3× in all
  1. 8 Apr 2024, Shift 1 · Q77Which among the following compounds will undergo fastest SN2\mathrm{S_N2} reaction.EasyDiagram basedHas a figure
  2. 10 Apr 2023, Shift 1 · Q73Identify the correct order of reactivity for the following pairs towards the respective mechanism (A) SN2\mathrm{S_N2} [structure:…MediumOtherHas 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.