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Friday, 9 October

JEE Main 2026 · ChemistryNumerical answerNumerical valueMediumMulti-step

JEE Main 6 April 2026, Shift 1, Chemistry Q72

Question 72 of 75 in this shift, Chemistry question 22 of 25, Section B.

Consider the following sequence of reactions. [C6H5−N=N−NH−C6H5\mathrm{C_6H_5-N=N-NH-C_6H_5}] →(iii) Warm 40 – 45°C(i) HCl; (ii) Aniline (in excess); (iv) Cool, acetic acid\xrightarrow[\text{(iii) Warm 40 – 45°C}]{\text{(i) HCl; (ii) Aniline (in excess); (iv) Cool, acetic acid}} Yellow Product (X) The percentage of nitrogen in the yellow product (X) formed is ________%. (Nearest Integer) (Given Molar mass in g mol−1^{-1} H:1, C:12, N:14)

The figure, in words

Reactant is diazoaminobenzene, C6H5-N=N-NH-C6H5 (two benzene rings joined by N=N-NH); reagents: (i) HCl, (ii) aniline (in excess), (iii) warm 40-45 C, (iv) cool, acetic acid; gives yellow product (X).

Official answer

21

NTA final key.

Chapter
Amines
Topic
Diazonium Salts
Idea tested
Diazoamino to Aminoazo Rearrangement

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 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
  4. 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
  5. 3 Apr 2025, Shift 1 · Q66Identify [A], [B] and [C], respectively in the following reaction sequence: [A] --(NaNO2_2, HCl, 273 - 278 K)--> benzenediazonium…EasyDiagram basedHas a figure
  6. 3 Apr 2025, Shift 1 · Q69In the following reactions, which one is NOT correct?EasyDiagram 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.