Emulsions of polyvinylacetate are used in:

1. polishes

2. latex paints

3. fire works

4. rayons

What is the simultaneous outcome of internal liquid from gels called?

1. Synerisis                         

2. Thixotropy

3. Swelling                           

4. None of the above

The charge on As₂S₃ sol is caused by the adsorption of:

1. H⁺                             

2. OH^-

3. ${\mathrm{O}}_2^{-}$                             

4. S^2-

Pd can adsorb 900 times its volume of hydrogen. This called:

1. Absorption

2. Adsorption

3. Occlusion

4. Both 2, and 3

The Brownian motion is due to:

(1)temperature fluctuations within the liquid phase

(2)attraction and repulsion between charges on the colloidal particles

(3)impact of the molecules of the dispersion medium on the colloidal particles

(4)convective currents

The phenomenon in which adsorption and absorption takes place simultaneously is called:

1. Desorption                       

2. Sorption

3. Both 1 and 2              

4. None of these

Cloud bursts are caused by?

Peptization is the process of?

1. Precipitating colloidal particles.

2. Purifying colloidal particles.

3. Dispersing the precipitate into a colloidal state.

4. None of the above.

Which acts as poison for Pd-charcoal in lindlar's catalyst ?

1. BaSO₄

2. Quiniline

3. Both 1. and 2.

4. None of these

Which is the electrolyte that is least effective in causing coagulation of +ve ferric hydroxide sol?

1. KBr

2. K₂SO₄

3. K₂CrO₄

4. K₃[Fe(CN)₆]