Verified Solution • 2025–26 Session moderate

QJEEM21Ch971c: JEE Main 2021 Chemistry - Class 12 JEEM21Ch971c Solution: In Freundlich adsorption isotherm, slope of AB line is :

In Freundlich adsorption isotherm, slope of AB line is :

JEE Main 2021 (Online) 24th February Morning Shift Chemistry - Surface Chemistry Question 66 English

Multiple Choice Options

  • A 1n with (1n=0to1)
  • B n with (n, 0.1 to 0.5)
  • C log⁡1n with (n<1)
  • D log n with (n > 1)

Step-by-Step Verified Solution

According to Freundlich adsorption isotherm, in the median range of pressure

       xm∝P1n

⇒  xm = kP1n

taking log both sides, we get,

logxm = logk + 1n logP

For straight line, comparing above equation to y = mx + c

So, m = slope = 1n

Hence 0 ≤ 1n ≤ 1

It value lies in between 0 to 1.

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