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Saturday, 31 October

JEE Main · Chemistry · Surface Chemistry

Freundlich Logarithmic Plot

JEE Main asked Freundlich Logarithmic Plot 7 times in 7 of the 108 shifts Lumi analysed, in 2020, 2021, 2022 and 2023. It belongs to Adsorption, in Surface Chemistry (Chemistry). The longest wait between two years asking it was 1 year. In 2020, 2021 and 2022 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
2020
last in 2023
Pattern
Comes in cycles
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2020, 2021, 2022 and 2023. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Chemistry questions.

00.10.20’170.17’200.07’210.07’220.07’230’240’250’26

Raw count: 2017: 0 in 1 shift · 2020: 2 in 12 shifts · 2021: 2 in 24 shifts · 2022: 2 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
  • 20222 of 24
  • 20212 of 24
  • 20202 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.

  • Adsorption from freundlich log plot
  • Adsorbed mass from freundlich plot

Difficulty

Easy 0Medium 7Hard 0

5 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. 8 Apr 2023, Shift 1 · Q63Which of the following represent the Freundlich adsorption isotherms? A. [graph: xm\frac{x}{m} vs pp] B. [graph: log⁡xm\log\frac{x}{m} vs…MediumDiagram basedHas a figure
  2. 27 Jun 2022, Shift 2 · Q89[figure: graph with vertical axis log⁡xm\log\frac{x}{m} (arrow pointing up) and horizontal axis log⁡p\log p (arrow pointing right); a straight…MediumNumerical valueHas a figure
  3. 28 Jul 2022, Shift 2 · Q59Among the following the number of curves not in accordance with Freundlich adsorption isotherm is ________. (a) plot of log(x/m) (y-axis)…MediumNumerical valueHas a figure
  4. 24 Feb 2021, Shift 1 · Q32In Freundlich adsorption isotherm, slope of AB line is :MediumDiagram basedHas a figure
  5. 3 Aug 2021, Shift 2 · Q58In an adsorption isotherm, it is seen that the graph of log⁡(xm)\log\left(\frac{x}{m}\right) vs log⁡P\log P, where PP is in atm, is a straight…MediumNumerical value
  6. 6 Sep 2020, Shift 2 · Q49For Freundlich adsorption isotherm, a plot of log⁡(x/m)\log(x/m) (yy-axis) and log⁡p\log p (xx-axis) gives a straight line. The intercept and…MediumNumerical value
  7. 2 Sep 2020, Shift 1 · Q48The mass of gas adsorbed, xx, per unit mass of adsorbate, mm, was measured at various pressures, pp. A graph between log⁡xm\log\frac{x}{m}…MediumNumerical value

Shifts: 2 Sep 2020, Shift 1, 6 Sep 2020, Shift 2, 24 Feb 2021, Shift 1, 3 Aug 2021, Shift 2, 27 Jun 2022, Shift 2, 28 Jul 2022, Shift 2, 8 Apr 2023, Shift 1.

Same topic

Other ideas in Adsorption

Adsorption has 13 ideas JEE Main has asked; 10 of them came up in more than one question.

Topic analysisChapter analysisAll repeated ideas