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Saturday, 31 October

JEE Main 2021 · ChemistryMultiple choiceAssertion–reasonEasyConceptual

JEE Main 25 July 2021, Shift 1, Chemistry Q47

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

Given below are two statements, one is labelled as Assertion (A) and other is labelled as Reason (R). Assertion (A) : Gabriel phthalimide synthesis cannot be used to prepare aromatic primary amines. Reason (R) : Aryl halides do not undergo nucleophilic substitution reaction. In the light of the above statements, choose the correct answer from the options given below :
  1. (1)Both (A) and (R) are true and (R) is correct explanation of (A).Official answer
  2. (2)Both (A) and (R) are true but (R) is not the correct explanation of (A).
  3. (3)(A) is true but (R) is false.
  4. (4)(A) is false but (R) is true.

Official answer

Option 1

NTA final key.

Chapter
Amines
Topic
Amines
Idea tested
Gabriel Phthalimide Synthesis

Same idea in other shifts

Asked 8× in all
  1. 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
  2. 6 Apr 2026, Shift 2 · Q68The number of compounds from the following which can undergo reaction with Br2\mathrm{Br_2}/KOH (alcoholic) to give respective products and…MediumOtherHas a figure
  3. 4 Apr 2024, Shift 2 · Q90Phthalimide is made to undergo following sequence of reactions. Phthalimide →(ii) Benzylchloride(i) KOH\xrightarrow[\text{(ii) Benzylchloride}]{\text{(i) KOH}} 'P'…MediumNumerical value
  4. 6 Apr 2023, Shift 2 · Q90Number of isomeric aromatic amines with molecular formula C8H11N\mathrm{C_8H_{11}N}, which can be synthesized by Gabriel Phthalimide synthesis…HardNumerical value
  5. 25 Jul 2022, Shift 1 · Q76An organic compound 'A' on reaction with NH3\mathrm{NH_3} followed by heating gives compound B. Which on further strong heating gives…MediumDiagram basedHas a figure
  6. 24 Feb 2021, Shift 2 · Q59The total number of amines among the following which can be synthesized by Gabriel synthesis is __________. (A) [figure: CH3\mathrm{CH_3}…MediumNumerical valueHas a figure
  7. 6 Sep 2020, Shift 2 · Q28Which of the following compounds can be prepared in good yield by Gabriel phthalimide synthesis ?EasySingle correctHas 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. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.