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Saturday, 31 October

JEE Main · Chemistry · Equilibrium

Acidic Buffer pH Calculation

JEE Main asked Acidic Buffer pH Calculation 4 times in 4 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. In 2022 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
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.

00.10.20’170’200.03’210.07’220’230’240’250.11’26

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 1 in 24 shifts · 2022: 2 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
  • 20222 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 at half neutralisation of weak acid
  • Buffer component from ph

Difficulty

Easy 2Medium 2Hard 0

2 of the 4 questions had a numerical answer.

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 · Q5520 mL of a solution of acetic acid required 28.4 mL of 0.1 M NaOH for its neutralization. A solution (X) was prepared by mixing 20 mL of…EasySingle correct
  2. 28 Jun 2022, Shift 2 · Q64A student needs to prepare a buffer solution of propanoic acid and its sodium salt with pH 4. The ratio of…MediumSingle correct
  3. 30 Jul 2022, Shift 2 · Q5450 mL of 0.1 M CH3COOH\mathrm{CH_3COOH} is titrated against 0.1 M NaOH solution. When 10 mL of NaOH is added, the pH of the solution becomes…MediumNumerical value
  4. 18 Mar 2021, Shift 1 · Q55In order to prepare a buffer solution of pH 5.74, sodium acetate is added to acetic acid. If the concentration of acetic acid in the…EasyNumerical value

Shifts: 18 Mar 2021, Shift 1, 28 Jun 2022, Shift 2, 30 Jul 2022, Shift 2, 4 Apr 2026, Shift 2.

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