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Friday, 9 October

JEE Main 2025 · ChemistryMultiple choiceDiagram basedEasyMulti-step

JEE Main 3 April 2025, Shift 1, Chemistry Q66

Question 66 of 75 in this shift, Chemistry question 16 of 25, Section A.

Identify [A], [B] and [C], respectively in the following reaction sequence: [A] --(NaNO2_2, HCl, 273 - 278 K)--> benzenediazonium chloride (C6H5N2+Cl−\mathrm{C_6H_5N_2^{+}Cl^{-}}) --(KI)--> [B] --(2Na, Dry ether)--> [C]

The figure, in words

Reaction scheme: [A] treated with NaNO2/HCl at 273-278 K gives benzenediazonium chloride, which with KI gives [B], which with 2Na in dry ether gives [C].
  1. (1)[figure: [A] aniline, [B] chlorobenzene, [C] benzene]
  2. (2)[figure: [A] aniline, [B] chlorobenzene, [C] iodobenzene]
  3. (3)[figure: [A] nitrobenzene, [B] iodobenzene, [C] biphenyl]
  4. (4)[figure: [A] aniline, [B] iodobenzene, [C] biphenyl]Official answer

Official answer

Option 4

NTA final key.

Chapter
Amines
Topic
Diazonium Salts
Idea tested
Synthesis of Iodobenzene

Same topic in other shifts

All Diazonium Salts questions
  1. 2 Apr 2026, Shift 2 · Q68Identify compounds A and E in the following reaction sequence.…MediumSingle correctHas a figure
  2. 4 Apr 2026, Shift 1 · Q67Product C of the following reaction sequence will be aniline →Br2/water\xrightarrow{\mathrm{Br_2/water}} A (Major Product)…MediumDiagram basedHas a figure
  3. 6 Apr 2026, Shift 1 · Q72Consider the following sequence of reactions. [C6H5−N=N−NH−C6H5\mathrm{C_6H_5-N=N-NH-C_6H_5}]…MediumNumerical valueHas a figure
  4. 6 Apr 2026, Shift 2 · Q67Consider the following organic reaction sequence. Choose the final product (X) from the following (consider the major product in all…HardSingle correctHas a figure
  5. 2 Apr 2025, Shift 2 · Q69When a concentrated solution of sulphanilic acid and 1-naphthylamine is treated with nitrous acid (273 K) and acidified with acetic acid,…MediumSingle correct
  6. 6 Apr 2024, Shift 2 · Q77Identify the product (A) in the following reaction. Aniline (benzene ring with NH2\mathrm{NH_2})…MediumDiagram 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 42 of the 174 JEE Main shifts held from 2017 to 2026.