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Saturday, 31 October

JEE Main · Chemistry · Polymers

Neoprene Synthesis

JEE Main asked Neoprene Synthesis 4 times in 4 of the 108 shifts Lumi analysed, in 2021 and 2022. It belongs to Polymers (Chemistry). The longest wait between two years asking it was 1 year. In 2021 and 2022 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
4
in 4 shifts
Years
2 of 8
First asked
2021
last in 2022
Pattern
Occasional
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2021 and 2022. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Chemistry questions.

00.050.10’170’200.07’210.07’220’230’240’250’26

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 2 in 24 shifts · 2022: 2 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
  • 20222 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

Match the list is the usual form. Skill tested: recall.

  • Match list on polymers and monomers
  • Structure of a named polymer

Difficulty

Easy 3Medium 1Hard 0

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. 30 Jun 2022, Shift 1 · Q78Match List - I with List - II. List - I Polymer (a) Acrilan (b) Neoprene (c) Polystyrene (d) Buna-N List - II Repeat Unit (i)…EasyMatch the listHas a figure
  2. 27 Jul 2022, Shift 2 · Q75Match List - I with List - II. List - I (Polymer) (A) Neoprene (B) Teflon (C) Acrilan (D) Natural rubber List - II (Monomer) (I)…EasyMatch the list
  3. 22 Jul 2021, Shift 2 · Q49Match List - I with List - II : List - I List - II (a) Chloroprene (i) [figure: skeletal structure drawn in lines only: a vertical stub…MediumMatch the listHas a figure
  4. 26 Feb 2021, Shift 1 · Q48The structure of Neoprene is :EasyDiagram basedHas a figure

Shifts: 26 Feb 2021, Shift 1, 22 Jul 2021, Shift 2, 30 Jun 2022, Shift 1, 27 Jul 2022, Shift 2.

Same topic

Other ideas in Polymers

Polymers has 22 ideas JEE Main has asked; 12 of them came up in more than one question. The 12 most asked are below.

Topic analysisChapter analysisAll repeated ideas