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Friday, 9 October

JEE Main 2020 · ChemistryMultiple choiceSingle correctEasyApplication

JEE Main 6 September 2020, Shift 2, Chemistry Q28

Question 28 of 75 in this shift, Chemistry question 3 of 25.

Which of the following compounds can be prepared in good yield by Gabriel phthalimide synthesis ?

The figure, in words

Options 1, 2 and 4 are structures drawn as benzene rings with substituents (listed in the option text)
  1. (1)[figure: benzene ring bearing CH2−C(=O)−NH2\mathrm{CH_2-C(=O)-NH_2}, i.e. C6H5CH2CONH2\mathrm{C_6H_5CH_2CONH_2}]
  2. (2)[figure: benzene ring bearing CH2NH2\mathrm{CH_2NH_2}, i.e. C6H5CH2NH2\mathrm{C_6H_5CH_2NH_2}]Official answer
  3. (3)CH3−CH2−NHCH3\mathrm{CH_3-CH_2-NHCH_3}
  4. (4)[figure: benzene ring bearing NH2\mathrm{NH_2}, i.e. aniline C6H5NH2\mathrm{C_6H_5NH_2}]

Official answer

Option 2

NTA final key (Sep 2020).

Chapter
Amines
Topic
Amines
Idea tested
Gabriel Phthalimide Synthesis

Same idea in other shifts

Asked 5× 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. 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
  4. 25 Jul 2021, Shift 1 · Q47Given below are two statements, one is labelled as Assertion (A) and other is labelled as Reason (R). Assertion (A) : Gabriel phthalimide…EasyAssertion–reason

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.