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Saturday, 31 October

JEE Main 2021 · ChemistryMultiple choiceDiagram basedMediumApplication

JEE Main 25 February 2021, Shift 2, Chemistry Q42

Question 42 of 90 in this shift, Chemistry question 12 of 30, Section A.

The major product of the following reaction is : [figure: benzene ring (circle inside hexagon), then an arrow with a skeletal reagent drawn above it (see figure_note) and H2SO4\mathrm{H_2SO_4} below]

The figure, in words

Reactant: benzene ring (circle inside hexagon) -> arrow labelled H2SO4 below; above the arrow a skeletal reagent: a carbon with NO2 drawn vertically up, a line down-left, and a line to a carbon with a double bond to the right. Option structures are skeletal drawings with a benzene ring and NO2 as described in option text.
  1. (1)[figure: benzene ring attached to a carbon bearing NO2 (drawn up), a line up-left and a two-line chain to the right]
  2. (2)[figure: benzene ring attached to a zig-zag chain; one carbon bears a line up, the next carbon bears NO2 to the right and a line down]Official answer
  3. (3)[figure: benzene ring attached to a zig-zag chain; a later carbon bears NO2 (drawn up) and a line to the right]
  4. (4)[figure: benzene ring attached to a carbon bearing NO2 (drawn up), then a next carbon bearing a line down and a line up-right]

Official answer

Option 2

NTA final key.

Chapter
Haloalkanes and Haloarenes
Topic
Aromatic Hydrocarbons
Idea tested
Friedel-Crafts Alkylation

Same idea in other shifts

Asked 7× in all
  1. 4 Apr 2026, Shift 2 · Q56Match the LIST-I with LIST-II List-I (Reaction): A. Williamson Synthesis B. Friedel Craft Reaction C. Bromination of vinyl benzene D.…EasyMatch the list
  2. 5 Apr 2026, Shift 1 · Q65For the following Friedel Craft's alkylation reaction, which of the statements are correct? [figure: benzene + n-propyl chloride…MediumOtherHas a figure
  3. 10 Apr 2023, Shift 2 · Q74The major product 'P' formed in the given reaction is:HardDiagram basedHas a figure
  4. 29 Jun 2022, Shift 2 · Q74[figure: six-membered ring drawn with alternating double bonds] + CH3CH2CH2Cl\mathrm{CH_3CH_2CH_2Cl} → 'A' Major Product (reagent over the arrow:…MediumDiagram basedHas a figure
  5. 8 Jan 2020, Shift 2 · Q50In the following sequence of reactions the maximum number of atoms present in molecule 'C' in one plane is __________.…MediumNumerical value
  6. 4 Sep 2020, Shift 2 · Q45The major product [C] of the following reaction sequence will be :…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.