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Saturday, 31 October

JEE Main · Chemistry · Biomolecules

Selective Oxidation of Monosaccharides

JEE Main asked Selective Oxidation of Monosaccharides 4 times in 4 of the 108 shifts Lumi analysed, in 2022, 2024 and 2026. It belongs to Carbohydrates, in Biomolecules (Chemistry). The longest wait between two years asking it was 2 years. In 2024 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
4
in 4 shifts
Years
3 of 8
First asked
2022
last in 2026
Pattern
Frequent
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2022, 2024 and 2026. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Chemistry questions.

00.10.20’170’200’210.03’220’230.09’240’250.11’26

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 0 in 24 shifts · 2022: 1 in 24 shifts · 2023: 0 in 12 shifts · 2024: 2 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
  • 20242 of 18
  • 20230 of 12
  • 20221 of 24
  • 20210 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: multi-step.

  • Identify structure from oxidation product optical activity
  • Match list on reagents and glucose products

Difficulty

Easy 0Medium 3Hard 1

Every question was multiple choice.

Every question

All 4 questions

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

  1. 4 Apr 2026, Shift 2 · Q68A D-aldotetrose on oxidation with concentrated HNO3\mathrm{HNO_3} resulted in optically inactive dicarboxylic acid. The structure of the…MediumDiagram basedHas a figure
  2. 31 Jan 2024, Shift 1 · Q79Match List I with List II LIST I A. Glucose/NaHCO3\mathrm{NaHCO_3}/Δ\Delta B. Glucose/HNO3\mathrm{HNO_3} C. Glucose/HI/Δ\Delta D.…MediumMatch the list
  3. 8 Apr 2024, Shift 1 · Q80The incorrect statement regarding the given structure is [figure: Fischer projection: CHO at top; then H-C-OH, HO-C-H, H-C-OH, H-C-OH;…MediumDiagram basedHas a figure
  4. 27 Jun 2022, Shift 1 · Q79L-isomer of a compound ‘A’ (C4H8O4\mathrm{C_4H_8O_4}) gives a positive test with [Ag(NH3)2]+\mathrm{[Ag(NH_3)_2]^+}. Treatment of ‘A’ with acetic…HardDiagram basedHas a figure

Shifts: 27 Jun 2022, Shift 1, 31 Jan 2024, Shift 1, 8 Apr 2024, Shift 1, 4 Apr 2026, Shift 2.

Same topic

Other ideas in Carbohydrates

Carbohydrates has 25 ideas JEE Main has asked; 13 of them came up in more than one question. The 12 most asked are below.

Topic analysisChapter analysisStudy this chapterAll repeated ideas