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Saturday, 31 October

JEE Main · Chemistry · Aldehydes, Ketones and Carboxylic Acids

Aldehyde vs Ketone Reactivity

JEE Main asked Aldehyde vs Ketone Reactivity 3 times in 3 of the 108 shifts Lumi analysed, in 2020 and 2024. It belongs to Nucleophilic Addition, in Aldehydes, Ketones and Carboxylic Acids (Chemistry). The longest wait between two years asking it was 4 years. In 2020 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
3
in 3 shifts
Years
2 of 8
First asked
2020
last in 2024
Pattern
Occasional
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2020 and 2024. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Chemistry questions.

00.10.20’170.17’200’210’220’230.05’240’250’26

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

Shift by shift

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

  • 20260 of 9
  • 20250 of 8
  • 20241 of 18
  • 20230 of 12
  • 20220 of 24
  • 20210 of 24
  • 20202 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: conceptual.

  • Order/ranking of reactivity toward nucleophilic addition
  • Rank aldehydes by nucleophilic addition reactivity

Difficulty

Easy 1Medium 2Hard 0

Every question was multiple choice.

Every question

All 3 questions

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

  1. 6 Apr 2024, Shift 1 · Q79Which among the following aldehydes is most reactive towards nucleophilic addition reactions?EasySingle correctHas a figure
  2. 3 Sep 2020, Shift 2 · Q39The increasing order of the reactivity of the following compounds in nucleophilic addition reaction is : Propanal, Benzaldehyde,…MediumSingle correct
  3. 2 Sep 2020, Shift 1 · Q42The increasing order of the following compounds towards HCN addition is : (i) 3-methoxybenzaldehyde (H3CO\mathrm{H_3CO} meta to CHO) (ii)…MediumDiagram basedHas a figure

Shifts: 2 Sep 2020, Shift 1, 3 Sep 2020, Shift 2, 6 Apr 2024, Shift 1.

Same topic

Other ideas in Nucleophilic Addition

Nucleophilic Addition has 20 ideas JEE Main has asked; 6 of them came up in more than one question. The 12 most asked are below.

Topic analysisChapter analysisStudy this chapterAll repeated ideas