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Saturday, 31 October

JEE Main 2021 · ChemistryMultiple choiceSingle correctMediumMulti-step

JEE Main 26 February 2021, Shift 1, Chemistry Q47

Question 47 of 90 in this shift, Chemistry question 17 of 30, Section A.

An amine on reaction with benzenesulphonyl chloride produces a compound insoluble in alkaline solution. This amine can be prepared by ammonolysis of ethyl chloride. The correct structure of amine is :

The figure, in words

Option 3 only: hexagon with inner circle, substituent NH-CH2CH2CH3 on the upper-right vertex.
  1. (1)CH3CH2CH2NHCH3\mathrm{CH_3CH_2CH_2NHCH_3}
  2. (2)CH3CH2CH2NH−CH2CH3\mathrm{CH_3CH_2CH_2\overset{H}{N}{-}CH_2CH_3} (H printed above N)Official answer
  3. (3)[figure: ring with inner circle bonded to NH−CH2CH2CH3\mathrm{NH{-}CH_2CH_2CH_3}]
  4. (4)CH3CH2NH2\mathrm{CH_3CH_2NH_2}

Official answer

Option 2

NTA final key.

Chapter
Amines
Topic
Amines
Idea tested
Hinsberg Test

Same idea in other shifts

Asked 13× 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. 8 Apr 2024, Shift 2 · Q79Given below are two statements : Statement (I) : All the following compounds react with p-toluenesulfonyl chloride. C6H5NH2\mathrm{C_6H_5NH_2}…MediumTwo statements
  3. 1 Feb 2024, Shift 2 · Q89Number of compounds which give reaction with Hinsberg's reagent is ________. [figure: eleven structures in three rows]MediumNumerical valueHas a figure
  4. 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
  5. 27 Jul 2022, Shift 1 · Q80Match List I with List II. List I | List II A. Benzenesulphonyl chloride | I. Test for primary amines B. Hoffmann bromamide reaction | II.…MediumMatch the list
  6. 29 Jul 2022, Shift 2 · Q77The Hinsberg reagent isEasySingle correctHas a figure
  7. 26 Jun 2022, Shift 2 · Q77Which statement is NOT correct for p-toluenesulphonyl chloride?EasySingle correct
  8. 3 Aug 2021, Shift 1 · Q49Match List I with List II : List I : A. Hell-Volhard-Zelinsky reaction ; B. Hinsberg’s reagent ; C. Isocyanide test ; D. Hoffmann…EasyMatch the list

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 108 of the 174 JEE Main shifts held from 2017 to 2026.