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Friday, 9 October

JEE Main 2021 · ChemistryMultiple choiceSingle correctMediumMulti-step

JEE Main 25 July 2021, Shift 1, Chemistry Q46

Question 46 of 90 in this shift, Chemistry question 16 of 30, Section A.

Which one of the products of the following reactions does not react with Hinsberg reagent to form sulphonamide ?

The figure, in words

Each option is a reaction scheme: an aromatic nitrile with the stated reagent.
  1. (1)[figure: 4-cyanobenzaldehyde (benzene ring with CN and CHO para) + LiAlH4\mathrm{LiAlH_4}, then H3O⊕\mathrm{H_3O^{\oplus}}]
  2. (2)[figure: benzonitrile (C6H5CN) + SnCl2\mathrm{SnCl_2} + HCl]Official answer
  3. (3)[figure: 3-methylbenzonitrile (CN and CH3 meta on benzene) + H2/Ni\mathrm{H_2/Ni}]
  4. (4)[figure: 4-nitrobenzonitrile (CN and NO2 para on benzene) + Na/Hg, C2H5OH\mathrm{C_2H_5OH}]

Official answer

Option 2

NTA final key.

Chapter
Amines
Topic
Amines
Idea tested
Hinsberg Test

Same idea in other shifts

Asked 3× in all
  1. 8 Apr 2024, Shift 1 · Q90Number of amine compounds from the following giving solids which are soluble in NaOH upon reaction with Hinsberg's reagent is __________.…MediumNumerical valueHas a figure
  2. 6 Apr 2023, Shift 1 · Q73Compound P (M.F. C14H13ON\mathrm{C_{14}H_{13}ON}; M.F. = MOLECULAR FORMULA) on treatment with HCl, Δ\Delta gives a Filter step: Residue Q and…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 42 of the 174 JEE Main shifts held from 2017 to 2026.