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Saturday, 31 October

JEE Main 2021 · ChemistryMultiple choiceDiagram basedEasyConceptual

JEE Main 25 July 2021, Shift 2, Chemistry Q46

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

What is the major product "P" of the following reaction ? [reaction scheme: structure] (i) NaNO2\mathrm{NaNO_2}, HCl, 278 K (ii) H2O\mathrm{H_2O} →\rightarrow P (major product)

The figure, in words

Starting material drawn as a seven-membered ring; one ring carbon bears CH3 (upper right) and a bond going to a bend that ends in NH2 (lower right).
  1. (1)[figure: seven-membered ring; a ring carbon bears OH (upper right) and a bend leading to N2⊕Cl⊖\mathrm{N_2^{\oplus}Cl^{\ominus}}]
  2. (2)[figure: seven-membered ring; a ring carbon bears CH3_3 (upper right) and a bend leading to OH]Official answer
  3. (3)[figure: seven-membered ring; a ring carbon bears CH3_3 (upper right) and a bend leading to CH3_3]
  4. (4)[figure: seven-membered ring; a ring carbon bears CH3_3 (upper right) and a bend leading to Cl]

Official answer

Option 2

NTA final key.

Chapter
Amines
Topic
Diazonium Salts
Idea tested
Replacement by H or OH

Same idea in other shifts

Asked 5× in all
  1. 2 Apr 2026, Shift 2 · Q68Identify compounds A and E in the following reaction sequence.…MediumSingle correctHas a figure
  2. 8 Apr 2023, Shift 2 · Q76The product (P) formed from the following multistep reaction is: [reaction: 4-nitrotoluene (benzene ring with NO2\mathrm{NO_2} and…MediumDiagram basedHas a figure
  3. 13 Apr 2023, Shift 2 · Q78Compound A from the following reaction sequence is: A →0−5∘CBr2, CS2\xrightarrow[0-5^\circ\mathrm{C}]{\mathrm{Br_2,\ CS_2}} B…MediumSingle correctHas a figure
  4. 3 Aug 2021, Shift 2 · Q47A. →2) Heat1) NaNO2(aq.), HCl\xrightarrow[\text{2) Heat}]{\text{1) }\mathrm{NaNO_{2(aq.)}},\ \mathrm{HCl}} B.…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. 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.