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Saturday, 31 October

JEE Main · Chemistry · Equilibrium

pH of Strong Acids and Bases

JEE Main asked pH of Strong Acids and Bases 7 times in 7 of the 108 shifts Lumi analysed, in 2021, 2022, 2023 and 2025. It belongs to pH and Buffers, in Equilibrium (Chemistry). The longest wait between two years asking it was 2 years. In 2021 and 2025 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
7
in 7 shifts
Years
4 of 8
First asked
2021
last in 2025
Pattern
Comes in cycles
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2021, 2022, 2023 and 2025. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Chemistry questions.

00.150.30’170’200.10’210.03’220.07’230’240.25’250’26

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 3 in 24 shifts · 2022: 1 in 24 shifts · 2023: 1 in 12 shifts · 2024: 0 in 18 shifts · 2025: 2 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
  • 20252 of 8
  • 20240 of 18
  • 20231 of 12
  • 20221 of 24
  • 20213 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 after dilution of strong acid
  • Mass of base for target ph

Difficulty

Easy 6Medium 1Hard 0

6 of the 7 questions had a numerical answer.

Every question

All 7 questions

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

  1. 7 Apr 2025, Shift 1 · Q54An aqueous solution of HCl with pH 1.0 is diluted by adding equal volume of water (ignoring dissociation of water). The pH of HCl solution…EasySingle correct
  2. 4 Apr 2025, Shift 2 · Q71x mg of Mg(OH)2\mathrm{Mg(OH)_2} (molar mass = 58) is required to be dissolved in 1.0 L of water to produce a pH of 10.0 at 298 K. The value of…EasyNumerical value
  3. 12 Apr 2023, Shift 1 · Q85An analyst wants to convert 1L HCl of pH =1 to a solution of HCl of pH 2. The volume of water needed to do this dilution is _________ mL.…EasyNumerical value
  4. 27 Jun 2022, Shift 2 · Q86pH value of 0.001 M NaOH solution is ________.EasyNumerical value
  5. 25 Jul 2021, Shift 2 · Q56Assuming that Ba(OH)2\mathrm{Ba(OH)_2} is completely ionised in aqueous solution under the given conditions the concentration of…EasyNumerical value
  6. 31 Aug 2021, Shift 2 · Q56The pH of a solution obtained by mixing 50 mL of 1 M HCl and 30 mL of 1 M NaOH is x×10−4x \times 10^{-4}. The value of xx is __________.…EasyNumerical value
  7. 4 Aug 2021, Shift 2 · Q57x×10−5x \times 10^{-5} g of Ca(OH)2\mathrm{Ca(OH)_2} are required to produce 200 cm3\mathrm{cm^3} of an aqueous solution of pH 10.0. The value of…MediumNumerical value

Shifts: 25 Jul 2021, Shift 2, 4 Aug 2021, Shift 2, 31 Aug 2021, Shift 2, 27 Jun 2022, Shift 2, 12 Apr 2023, Shift 1, 4 Apr 2025, Shift 2, 7 Apr 2025, 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