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Saturday, 31 October

JEE Main 2022 · ChemistryMultiple choiceDiagram basedMediumConceptual

JEE Main 29 July 2022, Shift 1, Chemistry Q72

Question 72 of 90 in this shift, Chemistry question 12 of 30, Section A.

Which among the following is the strongest Bronsted base ?

The figure, in words

All four options are structures of amines with the lone pair on N shown.
  1. (1)[figure: triethylamine, N bonded to three ethyl groups (H3C-CH2 drawn three times), lone pair on N]
  2. (2)[figure: diethylamine, N bearing H and two ethyl groups (H3C-CH2), lone pair on N]
  3. (3)[figure: five-membered ring with N bearing CH3 and lone pair, one C=C double bond in the ring next to N]
  4. (4)[figure: bicyclic amine, N with lone pair at a bridgehead of a bicyclic ring system]Official answer

Official answer

Option 4

NTA final key.

Chapter
Amines
Topic
Amines
Idea tested
Aliphatic Amine Basicity

Same idea in other shifts

Asked 2× in all
  1. 27 Aug 2021, Shift 1 · Q47Which of the following is not a correct statement for primary aliphatic amines ?MediumSingle correct

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.