In which of the sols, the colloidal particles are with a negative charge?

1. TiO₂

2. Hemoglobin

3. Starch

4. Hydrated Al₂O₃

At the critical micelle concentration (CMC) the surfactant molecules:
1. Associate
2. Dissociate
3. Decompose
4. Become completely soluble

According to Hardy Schulze law, the order of coagulation power of cations will be:

1. $N{a}^{+}$ $>$ $B{a}^{+2}$ $$ $>$ $A{l}^{+3}$

2.  $A{l}^{+3}$ $>$ $B{a}^{+2}$ $$ $>$ $N{a}^{+}$

3.  $B{a}^{+2}$ $>$ $A{l}^{+3}$ $$ $>$ $N{a}^{+}$

4. $$ $A{l}^{+3}$ $$ $>$ $N{a}^{+}>$ $B{a}^{+2}$ $$

Which one of the following methods is commonly used method for destruction of colloid:

1. Dialysis

2. Condensation

3. Filtration by animal membrane

4. By adding electrolyte

Positions of the non-polar & polar parts in Micelle are:

Which statement is not correct regarding the adsorption of a gas on the surface of a solid:

According to the adsorption theory of catalysis, the speed of the reaction increase because:

Incorrect statement regarding adsorption is:

Why is a finely divided substance more effective as an adsorbent?

1. Small surface area.

2. Large surface area.

3. Weak molecular bonding.

4. Strong molecular bonding.

The factors that influence the adsorption of a gas on a solid is/are:

1. Nature of the gas.

2. Surface area of the solid.

3. Effect of pressure.

4. All of the above.