Learn

Saturday, 31 October

JEE Main 2023 · ChemistryMultiple choiceDiagram basedHardMulti-step

JEE Main 13 April 2023, Shift 1, Chemistry Q78

Question 78 of 90 in this shift, Chemistry question 18 of 30, Section A.

In the reaction given below [figure: tetralin ring system spiro-fused at C1 to a cyclopentane ring, with OH on the spiro carbon and a H2N\mathrm{H_2N}-CH2CH2- chain on the same carbon] →ii) KOHi) HCl\xrightarrow[\text{ii) KOH}]{\text{i) HCl}} 'B' Major Product 'B' is :

The figure, in words

Reactant: spiro[tetralin-1,1'-cyclopentane] carrying OH and a 2-aminoethyl chain on the spiro carbon; reagents (i) HCl (ii) KOH. All options are line-structures.
  1. (1)[figure: spiro tetralin-cyclopentane with an exocyclic CH=CH-type chain bearing NH2\mathrm{NH_2} (alkene)]
  2. (2)[figure: ring-expanded fused six-six ring system (cyclohexane fused to tetralin) with CH2CH2NH2\mathrm{CH_2CH_2NH_2} chain]
  3. (3)[figure: spiro tetralin-cyclopentane with a pyrrolidine ring (NH) spiro/fused at the same carbon]
  4. (4)[figure: ring-expanded fused six-six ring system with a ring C=C and CH2CH2NH2\mathrm{CH_2CH_2NH_2} chain]Official answer

Official answer

Option 4

NTA final key.

Chapter
Amines
Topic
No close match in our taxonomy
Idea tested
No close match in our taxonomy

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.