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Saturday, 31 October

JEE Main · Chemistry · Equilibrium

Basic Buffer pH Calculation

JEE Main asked Basic Buffer pH Calculation 3 times in 3 of the 108 shifts Lumi analysed, in 2021, 2022 and 2026. It belongs to pH and Buffers, in Equilibrium (Chemistry). The longest wait between two years asking it was 4 years.

Updated 2026-10-24

Times asked
3
in 3 shifts
Years
3 of 8
First asked
2021
last in 2026
Pattern
Frequent
across the analysed shifts

Questions on this idea a shift, by year

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

00.10.20’170’200.03’210.03’220’230’240’250.11’26

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 1 in 24 shifts · 2022: 1 in 24 shifts · 2023: 0 in 12 shifts · 2024: 0 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
  • 20240 of 18
  • 20230 of 12
  • 20221 of 24
  • 20211 of 24
  • 20200 of 12
  • 20170 of 1

Asked in that shift More than once Not asked

How JEE Main framed it

Numerical value is the usual form. Skill tested: calculation.

  • Ph of basic buffer mixture
  • Mass of salt for basic buffer of given ph

Difficulty

Easy 0Medium 3Hard 0

2 of the 3 questions had a numerical answer.

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. 4 Apr 2026, Shift 1 · Q74The pH of a solution obtained by mixing 55 mL of 0.10.1 M NH4OH\mathrm{NH_4OH} solution with 250250 mL of 0.10.1 M NH4Cl\mathrm{NH_4Cl} solution…MediumNumerical value
  2. 26 Jul 2022, Shift 2 · Q63Class XII students were asked to prepare one litre of buffer solution of pH 8.26 by their Chemistry teacher. The amount of ammonium…MediumSingle correct
  3. 26 Aug 2021, Shift 1 · Q55The OH−\mathrm{OH^-} concentration in a mixture of 5.0 mL of 0.0504 M NH4Cl\mathrm{NH_4Cl} and 2 mL of 0.0210 M NH3\mathrm{NH_3} solution is…MediumNumerical value

Shifts: 26 Aug 2021, Shift 1, 26 Jul 2022, Shift 2, 4 Apr 2026, Shift 1.

Same topic

Other ideas in pH and Buffers

pH and Buffers has 22 ideas JEE Main has asked; 11 of them came up in more than one question. The 12 most asked are below.

Topic analysisChapter analysisStudy this chapterAll repeated ideas