In the Freundlich adsorption isotherm, the value of 1/n is:
1. Between 0 and 1 in all cases.
2. Between 2 and 4 in all cases.
3. 1 in the case of physical adsorption.
4. 1 in the case of chemisorption.

Which one of the following statements about enzyme catalysis is incorrect?

The protecting power of lyophilic colloidal sol is expressed in terms of:

1. Coagulation value

2. Gold number

3. Critical micelle concentration

4. Oxidation number

If x is the amount of adsorbate and m is the amount of adsorbent, which of the following relations is not related to adsorption process?

1.  $\frac{\mathrm{x}}{\mathrm{m}}=\mathrm{f}\left(\mathrm{T}\right)$ $\mathrm{at}$ $\mathrm{constant}$ $\mathrm{P}$

2.  $\mathrm{p}=\mathrm{f}\left(\mathrm{T}\right)$ $\mathrm{at}$ $\mathrm{constant}$ $\left(\mathrm{x}/\mathrm{m}\right)$

3.  $\frac{\mathrm{x}}{\mathrm{m}}=\mathrm{p}\times \mathrm{T}$

4.  $\frac{\mathrm{x}}{\mathrm{m}}=\mathrm{f}\left(\mathrm{p}\right)$ $\mathrm{at}$ $\mathrm{constant}$ $\mathrm{T}$

Which mixture of the solutions will lead to the formation of a negatively charged colloidal [AgI]I^- sol?

1. 50 mL of 0.1 M AgNO₃ + 50 mL of 0.1 M KI

2. 50 mL of 1 M AgNO₃ + 50 mL of 0.5 M KI

3. 50 mL of 1 M AgNO₃ + 50 mL of 2 M KI

4. 50 mL of 2 M AgNO₃ + 50 mL of 1.5 M KI

Which of the following statements is correct for the spontaneous adsorption of a gas?

The decomposition of phosphine (PH₃) on tungsten at low pressure is a first-order reaction. It is because the:

1. rate is proportional to the surface coverage

2. rate is inversely proportional to the surface coverage

3. rate is independent of the surface coverage

4. rate of decomposition is very slow

What happens during electro-osmosis of Fe(OH)₃ sol?