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Saturday, 31 October

JEE Main · Chemistry · Amines

Replacement by H or OH

JEE Main asked Replacement by H or OH 5 times in 5 of the 108 shifts Lumi analysed, in 2021, 2023 and 2026. It belongs to Diazonium Salts, in Amines (Chemistry). The longest wait between two years asking it was 3 years. In 2021 and 2023 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
5
in 5 shifts
Years
3 of 8
First asked
2021
last in 2026
Pattern
Frequent
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2021, 2023 and 2026. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Chemistry questions.

00.10.20’170’200.07’210’220.14’230’240’250.11’26

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 2 in 24 shifts · 2022: 0 in 24 shifts · 2023: 2 in 12 shifts · 2024: 0 in 18 shifts · 2025: 0 in 8 shifts · 2026: 1 in 9 shifts.

Shift by shift

Each square is one analysed shift, in date order. Open a filled one for that paper.

  • 20261 of 9
  • 20250 of 8
  • 20240 of 18
  • 20232 of 12
  • 20220 of 24
  • 20212 of 24
  • 20200 of 12
  • 20170 of 1

Asked in that shift More than once Not asked

How JEE Main framed it

Single correct is the usual form. Skill tested: multi-step.

  • Identify compounds in reaction sequence
  • Predict product of reaction sequence

Difficulty

Easy 2Medium 3Hard 0

Every question was multiple choice.

Every question

All 5 questions

From the official JEE Main shift papers, newest first. Open one for the full question, the options and the official answer.

  1. 2 Apr 2026, Shift 2 · Q68Identify compounds A and E in the following reaction sequence.…MediumSingle correctHas a figure
  2. 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
  3. 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
  4. 25 Jul 2021, Shift 2 · Q46What is the major product "P" of the following reaction ? [reaction scheme: structure] (i) NaNO2\mathrm{NaNO_2}, HCl, 278 K (ii)…EasyDiagram basedHas a figure
  5. 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

Shifts: 25 Jul 2021, Shift 2, 3 Aug 2021, Shift 2, 8 Apr 2023, Shift 2, 13 Apr 2023, Shift 2, 2 Apr 2026, Shift 2.

Same topic

Other ideas in Diazonium Salts

Diazonium Salts has 16 ideas JEE Main has asked; 8 of them came up in more than one question. The 12 most asked are below.

Topic analysisChapter analysisStudy this chapterAll repeated ideas