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Saturday, 31 October

JEE Main 2023 · ChemistryMultiple choiceDiagram basedHardMulti-step

JEE Main 11 April 2023, Shift 2, Chemistry Q78

Question 78 of 90 in this shift, Chemistry question 18 of 30, Section A.

Compound ‘B’ is [reaction scheme: a benzene ring bearing CH3 (top), OH (lower right) and isopropyl (bottom) →HClNaNO2\xrightarrow[\mathrm{HCl}]{\mathrm{NaNO_2}} A →H2ONH4SH\xrightarrow[\mathrm{H_2O}]{\mathrm{NH_4SH}} B (Major)]

The figure, in words

Starting compound: benzene ring with CH3 at top, OH at lower right, isopropyl at bottom (carvacrol-type skeleton). Reagents NaNO2/HCl gives A; NH4SH/H2O gives B (major).
  1. (1)[figure: benzene ring with CH3 (top), OH (lower right), isopropyl (bottom) and NH2\mathrm{NH_2} (upper left)]Official answer
  2. (2)[figure: benzene ring with CH3 (top), OH (lower right), isopropyl (bottom) and HS (upper left)]
  3. (3)[figure: benzene ring with CH3 (top), isopropyl (bottom) and SH (lower right, in place of OH)]
  4. (4)[figure: benzene ring with only CH3 (top) and isopropyl (bottom); no other substituent]

Official answer

Option 1

NTA final key.

Chapter
Amines
Topic
No close match in our taxonomy
Idea tested
No close match in our taxonomy

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.