Learn

Saturday, 31 October

JEE Main · Chemistry · Aldehydes, Ketones and Carboxylic Acids

Reduction of Cyanohydrins

JEE Main asked Reduction of Cyanohydrins 2 times in 2 of the 108 shifts Lumi analysed, all in 2021. It belongs to Nucleophilic Addition, in Aldehydes, Ketones and Carboxylic Acids (Chemistry). In 2021 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
2
in 2 shifts
Years
1 of 8
First asked
2021
the only year
Pattern
Gone quiet
across the analysed shifts

Questions on this idea a shift, by year

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

00.050.10’170’200.07’210’220’230’240’250’26

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 2 in 24 shifts · 2022: 0 in 24 shifts · 2023: 0 in 12 shifts · 2024: 0 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
  • 20240 of 18
  • 20230 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

Diagram based is the usual form. Skill tested: application.

  • Predict product of reaction sequence
  • Predict product of cyanohydrin reaction sequence

Difficulty

Easy 0Medium 2Hard 0

Every question was multiple choice.

Every question

All 2 questions

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

  1. 31 Aug 2021, Shift 1 · Q48The major products A and B in the following set of reactions are :MediumDiagram basedHas a figure
  2. 26 Aug 2021, Shift 2 · Q46[reaction scheme] drawn structure (a skeletal chain with a branch, ending in a C=O group with H) --“X”, HCN, H2O\mathrm{H_2O}--> drawn…MediumDiagram basedHas a figure

Shifts: 26 Aug 2021, Shift 2, 31 Aug 2021, 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