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Saturday, 10 October

JEE Main 2023 · ChemistryMultiple choiceDiagram basedMediumApplication

JEE Main 6 April 2023, Shift 1, Chemistry Q78

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

The major products A and B from the following reactions are: [Reactant: acetanilide, C6H5NHCOCH3\mathrm{C_6H_5NHCOCH_3}; with Br2/AcOH\mathrm{Br_2/AcOH} giving A and LiAlH4\mathrm{LiAlH_4} giving B]

The figure, in words

Reaction scheme: acetanilide (benzene ring with NH-C(=O)CH3) with Br2/AcOH giving product A (left/right arrow) and LiAlH4 giving product B. Options are drawn structure pairs A, B.
  1. (1)A = p-bromoacetanilide (4-Br-C6H4-NHCOCH3), B = N-ethylaniline (C6H5NHCH2CH3\mathrm{C_6H_5NHCH_2CH_3})Official answer
  2. (2)A = 2,4,6-tribromoacetanilide, B = C6H5NHCH(OH)CH3\mathrm{C_6H_5NHCH(OH)CH_3}
  3. (3)A = 2,4,6-tribromoacetanilide, B = aniline (C6H5NH2\mathrm{C_6H_5NH_2})
  4. (4)A = p-bromoacetanilide (4-Br-C6H4-NHCOCH3), B = C6H5NHCH(OH)CH3\mathrm{C_6H_5NHCH(OH)CH_3}

Official answer

Option 1

NTA final key.

Chapter
Amines
Topic
Amines
Idea tested
Protection of Aniline for Mono-Substitution

Same topic in other shifts

All Amines questions
  1. 2 Apr 2026, Shift 1 · Q67Match List - I with List - II. List - I (Mixture of Compounds) : A. Diethyl amine + Ethyl amine B. Acetaldehyde + Acetone C. Ethanol +…MediumMatch the list
  2. 2 Apr 2026, Shift 1 · Q68Consider the three aromatic molecules (P, Q and R) whose structures have been given below : [figure: structures P, Q, R] The correct order…HardSingle correctHas a figure
  3. 4 Apr 2026, Shift 2 · Q67The strongest conjugate acid will result from:EasySingle correctHas a figure
  4. 5 Apr 2026, Shift 1 · Q66Benzyl isocyanide can be obtained from A. [figure: benzyl bromide, C6H5CH2Br\mathrm{C_6H_5CH_2Br}] →AgCN\xrightarrow{\mathrm{AgCN}} B. [figure:…MediumOtherHas a figure
  5. 5 Apr 2026, Shift 1 · Q68Identify the incorrect statements. A. [figure: benzylamine, C6H5CH2NH2\mathrm{C_6H_5CH_2NH_2}] is a stronger base than [figure: aniline,…MediumOtherHas a figure
  6. 5 Apr 2026, Shift 2 · Q67Given below are two statements : Statement I : Heating benzamide with bromine in an ethanolic solution of sodium hydroxide will give…MediumTwo statements

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.