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Friday, 9 October

JEE Main 2024 · ChemistryMultiple choiceDiagram basedMediumMulti-step

JEE Main 6 April 2024, Shift 2, Chemistry Q79

Question 79 of 90 in this shift, Chemistry question 19 of 30, Section A.

The major products formed : Anisole (benzene ring with OCH3\mathrm{OCH_3}) →HNO3, H2SO4\xrightarrow{\mathrm{HNO_3,\ H_2SO_4}} 'A' →FeBr2 (excess)\xrightarrow[\mathrm{Fe}]{\mathrm{Br_2\ (excess)}} 'B' A and B respectively are :

The figure, in words

Anisole nitrated then brominated with excess Br2/Fe; options are pairs of substituted anisole structures.
  1. (1)[structures: A = 2-nitroanisole (OCH3 and NO2 ortho); B = 4-bromo-2-nitroanisole (OCH3, NO2 ortho, Br para to OCH3)]
  2. (2)[structures: A = 4-nitroanisole; B = 2-bromo-4-nitroanisole (OCH3, Br ortho, NO2 para)]
  3. (3)[structures: A = 2-nitroanisole; B = 2,4-dibromo-6-nitroanisole (OCH3, NO2 ortho, Br other ortho, Br para)]
  4. (4)[structures: A = 4-nitroanisole; B = 2,6-dibromo-4-nitroanisole (OCH3, Br at both ortho, NO2 para)]Official answer

Official answer

Option 4

NTA final key.

Chapter
Haloalkanes and Haloarenes
Topic
Aromatic Hydrocarbons
Idea tested
Synergic Directing Effects in Di-substituted Benzenes

Same idea in other shifts

Asked 3× in all
  1. 3 Apr 2025, Shift 2 · Q67In the following series of reactions identify the major products A & B respectively Bromobenzene…MediumDiagram basedHas a figure
  2. 6 Apr 2024, Shift 2 · Q89Reaction: ethoxybenzene (benzene ring with OC2H5\mathrm{OC_2H_5}) →HNO3, H2SO4\xrightarrow{\mathrm{HNO_3,\ H_2SO_4}} P (major product)…MediumNumerical valueHas 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 42 of the 174 JEE Main shifts held from 2017 to 2026.