Question:

For adsorption of a gas on a solid ,the plot of log x/m vs log P is linear with slope equal to :(n being whole number)

Updated On: Aug 3, 2024
  • k
  • log k
  • n
  • 1/n
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The Correct Option is D

Solution and Explanation

If we plot a graph between log $\frac{ X}{m}$ and log p, a straight line will be obtained. The slope of the line is equal to $\frac{1}{n}$ and the intercept is equal to log k. where, $\frac{ X}{m}$ = amount of adsorption .According to Freundlich adsorption isotherm $\frac{ X}{m} = k p^{1/n}$ $ m= \frac{1}{n} (slope)$ Taking log of both sides, $ log \frac{ X}{m} = log k + \frac{1}{n} log p $ from $ \, \, \, y = mx +c $
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Concepts Used:

Surface Chemistry

The study of the chemical phenomena that occur at the interface of two surfaces which can be solid-liquid, solid-gas, solid-vacuum, liquid-gas, etc. 

Read Also: Surface Chemistry

Applications of surface chemistry are:

Adsorption:

The process of attraction and aggregation of the molecules of a substance on the surface of a solid is known as adsorption. For Example, N2 adsorbs on the surface of activated charcoal

Two types of adsorption are:-

  • Chemisorption: It is also known as Chemical Adsorption.
  • Physisorption: It is also known as Physical Adsorption.

Corrosion:

The process through which the refined metals convert themselves into more stable compounds is known as corrosion.

Crystallisation:

The type of technique used in order to purify the substances to separate Solids from liquids is known as crystallisation.

Heterogeneous Catalysis:

The process wherein a catalyst is used in order to increase the rate of a chemical reaction is known as catalysis. The catalyst does not undergo any transformation and can be recovered in a chemically unchanged state. 

There are two types of catalysis:-

  • When the catalyst involved and the reacting substances are same states of matter or in the same phase, it is known as Homogeneous Catalysis.
  • When the catalyst involved and the reacting substances are in different states of matter or different phases, it is known as Heterogeneous Catalysis.