Langmuir Isotherm

Q. Which of the following graphs represents the Langmuir adsorption isotherm correctly?

1. 
2. 
3. 
4. None of these

Q.

The correct expression for Langmuir adsorption isotherm is

1. $\frac{x}{m}=\frac{aP}{b}$

2. $\frac{x}{m}=\frac{aP}{1+bP}$

3. $\frac{x}{m}=\frac{1+aP}{1+bP}$

4. $\frac{x}{m}=\frac{1}{a}+\frac{bP}{a}$

Q. Choose the correct statement(s) regarding adsorption of gases on solids:

1. The extent of adsorption of a gas depends on pressure of the gas.
2. All of the above.
3. As the temperature increases, adsorption is favoured.
4. The extent of adsorption of a gas does not depend on pressure of the gas.

Q. Which of the following graphs represents the Langmuir adsorption isotherm correctly?

1. 
2. 
3. 
4. None of these

Q. At high pressures, Langmuir adsorption isotherm takes the form:

1. $\frac{x}{m}=\frac{\mathrm{ap}}{1+\mathrm{bp}}$
   
2. $\frac{x}{m}=\mathrm{ap}$
   
3. $\frac{m}{x}=\frac{b}{a}+\frac{1}{\mathrm{ap}}$
   
4. $\frac{x}{m}=\frac{a}{b}$
   

Q. A gas undergoes physical adsorption on a surface and follows the given Freundlich adsorption isotherm equation $\frac{x}{m}=k{p}^{0.5}$
Adsorption of the gas increase with

1. decrease in $p$ and decrease in $T$
2. increase in $p$ and increase in $T$
3. increase in $p$ and decrease in $T$
4. decrease in $p$ and increase in $T$

Q. The Langmuir adsorption isotherm is deduced using the assumption

1. The adsorbed molecules interact with each other.
2. The adsorption takes place in multilayers.
3. The adsorption sites are equivalent in their ability to adsorb the particles.
4. The heat of adsorption varies with coverage.

Q. The Langmuir adsorption isotherm is deduced by assuming that :