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Saturday, 31 October

JEE Main 2020 · ChemistryMultiple choiceDiagram basedHardConceptual

JEE Main 4 September 2020, Shift 2, Chemistry Q40

Question 40 of 75 in this shift, Chemistry question 15 of 25.

Which of the following compounds will form the precipitate with aq.AgNO3\mathrm{AgNO_3} solution most readily ?

The figure, in words

All four options are drawn line structures (no stem figure).
  1. (1)[figure: N bonded to (i) a two-segment line to the left, (ii) a two-segment line to the right ending in Br, (iii) a six-membered ring drawn below with alternating double bonds]
  2. (2)[figure: six-membered saturated ring containing N; N bonded to a two-segment line ending in Br]Official answer
  3. (3)[figure: O bonded to a single segment on the left and to a two-segment line on the right ending in Br]
  4. (4)[figure: N bonded to (i) a two-segment line to the left, (ii) a three-segment line to the right ending in Br, (iii) a six-membered ring below with alternating double bonds, carrying OCH3\mathrm{OCH_3} at the position opposite N]

Official answer

Option 2

NTA final key (Sep 2020).

Chapter
Haloalkanes and Haloarenes
Topic
SN1 and SN2 Mechanisms
Idea tested
Neighboring Group Participation (NGP)

Same topic in other shifts

All SN1 and SN2 Mechanisms questions
  1. 2 Apr 2026, Shift 1 · Q64Given below are two statements : Statement (I) : Benzyl chloride reacts faster in SN1\mathrm{S_N1} mechanism than ethyl chloride. Statement…EasyTwo statements
  2. 2 Apr 2026, Shift 2 · Q65Correct statements regarding alkyl halides (R - X) among the following are: A. Alcohol being less polar solvent as compared to water,…MediumSingle correct
  3. 4 Apr 2026, Shift 1 · Q65Match the LIST-I with LIST-II List-I (Name of reaction): A. Finkelstein reaction; B. Swarts reaction; C. Sandmeyer's reaction; D. Fittig…EasyMatch the list
  4. 8 Apr 2026, Shift 2 · Q63The major product of which of the following reaction is not obtained by rearrangement reaction ?MediumDiagram basedHas a figure
  5. 2 Apr 2025, Shift 2 · Q67Match List - I with List - II. List - I (Reaction) (A)…EasyMatch the listHas a figure
  6. 4 Apr 2024, Shift 2 · Q76Find out the major product formed from the following reaction. [Me : −CH3-\mathrm{CH_3}] →Me2NH (2 equiv)\xrightarrow{\mathrm{Me_2NH\ (2\ equiv)}}HardDiagram 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.