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Saturday, 10 October

JEE Main 2022 · ChemistryMultiple choiceSingle correctMediumMulti-step

JEE Main 24 June 2022, Shift 1, Chemistry Q73

Question 73 of 90 in this shift, Chemistry question 13 of 30, Section A.

In the given reaction sequence, the major product 'C' is : C8H10→H2SO4HNO3A→ΔBr2B→alcoholic KOHC\mathrm{C_8H_{10}}\xrightarrow[\mathrm{H_2SO_4}]{\mathrm{HNO_3}}\mathrm{A}\xrightarrow[\Delta]{\mathrm{Br_2}}\mathrm{B}\xrightarrow{\text{alcoholic KOH}}\mathrm{C}

The figure, in words

Options are structures of nitro-substituted styrenes.
  1. (1)[figure: benzene ring bearing -C(NO2)=CH2 (nitro on the vinylic carbon)]
  2. (2)[figure: 4-nitrostyrene, O2N\mathrm{O_2N}-C6H4-CH=CH2 (para)]Official answer
  3. (3)[figure: O2N\mathrm{O_2N}-C6H4-C(NO2)=CH2 (para nitro ring, nitro on the vinylic carbon)]
  4. (4)[figure: 2-nitrostyrene, ortho-nitro C6H4-CH=CH2]

Official answer

Option 2

NTA final key (2022 Session 1).

Chapter
Haloalkanes and Haloarenes
Topic
Aromatic Hydrocarbons
Idea tested
Ortho-Para vs Meta Directing

Same idea in other shifts

Asked 3× in all
  1. 2 Apr 2026, Shift 1 · Q66For the given molecule, "xx", the preferred site for the attack of the electrophile is :MediumDiagram basedHas a figure
  2. 8 Apr 2025, Shift 2 · Q66Choose the correct set of reagents for the following conversion. Ethyl benzene → [structure: p-bromostyrene, i.e. benzene ring with CH=CH2…MediumSingle correctHas 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.