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Saturday, 31 October

JEE Main · Chemistry · Hydrogen

Ion-Exchange Resins for Water Softening

JEE Main asked Ion-Exchange Resins for Water Softening 3 times in 3 of the 108 shifts Lumi analysed, in 2021 and 2023. It belongs to Hydrogen and Hydrides, in Hydrogen (Chemistry). The longest wait between two years asking it was 2 years. In 2021 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
2021
last in 2023
Pattern
Occasional
across the analysed shifts

Questions on this idea a shift, by year

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

00.050.10’170’200.07’210’220.07’230’240’250’26

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 2 in 24 shifts · 2022: 0 in 24 shifts · 2023: 1 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
  • 20231 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: recall.

  • Statement i/ii on water softening
  • Identify method for preparing deionised water

Difficulty

Easy 2Medium 1Hard 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. 13 Apr 2023, Shift 1 · Q66Given below are two statements : Statement I: Permutit process is more efficient compared to the synthetic resin method for the softening…MediumTwo statements
  2. 17 Mar 2021, Shift 2 · Q36The functional groups that are responsible for the ion-exchange property of cation and anion exchange resins, respectively, are :EasySingle correct
  3. 26 Aug 2021, Shift 1 · Q36Which one of the following methods is most suitable for preparing deionized water ?EasySingle correct

Shifts: 17 Mar 2021, Shift 2, 26 Aug 2021, Shift 1, 13 Apr 2023, Shift 1.

Same topic

Other ideas in Hydrogen and Hydrides

Hydrogen and Hydrides has 29 ideas JEE Main has asked; 21 of them came up in more than one question. The 12 most asked are below.

Topic analysisChapter analysisAll repeated ideas