The interface that cannot be obtained is 

1. Liquid-liquid

2. Solid-liquid

3. Liquid-gas

4. Gas-gas

 

The term ‘sorption’ stands for.........

1.  Absorption

2.  Adsorption 

3.  Both absorption and adsorption

4.  Desorption

Extent of adsorption of adsorbate from the solution phase increases with:
1. Increase in amount of adsorbate in solution.
2. Decrease in surface area of adsorbent.
3.  Increase in temperature of solution.
4. Decrease in amount of adsorbate in solution.

Which one of the following is not applicable to the phenomenon of adsorption?

Physical adsorption is not favoured by : 

1. High pressure.

2. Negative $∆$H

3. Higher critical temperature of adsorbate.

4. High temperature.

Extent of physisorption of a gas increases with ......

1. Increase in temperature.

2. Decrease in temperature.

3.  Decrease in surface area of adsorbent.

4.  Decrease in strength of van der Waals’ force. 

Freundlich adsorption isotherm is given by the expression $\frac{x}{m}=k{p}^{\frac{1}{n}}$ Which of the following conclusions can be drawn from this expression?

The correct choice among the given is -
1. (a), (b)
2. (b), (c)
3. (c), (d)
4. (a), (c)

H₂ gas is adsorbed on activated charcoal to a very little extent in comparison to easily liquefiable gases due to -

a.  Very strong van der Waals’ interaction

b.  Very weak van der Waals’ forces

c.  Very low critical temperature

d.  Very high critical temperature

The correct choice among the given is -

1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)

The correct statements among the following are :

1. (a, b)

2. (b, c)

3. (c, d)

4. (b, d)

An emulsion cannot be broken by ............. and ................

1. Heating.

2. Adding more amount of dispersion medium.

3. Freezing.

4. Centrifugation