Dispersion Medium

Q.

How will you differentiate between a suspension and a colloid? Give one example of each.

Q. What is the difference between dispersed phase and dispersing medium

Q. The dispersed phase and dispersion medium, respectively, of cheese are

1. solid and liquid
2. liquid and gas
3. solid and gas
4. liquid and solid

Q. What is the dispersef phase in gel?

Q.

What type of solution is milk?

1. Homogeneous solution

2. Suspension

3. Colloidal

4. None of these

Q.

Define the terms; solution, suspension and colloid. Make a comparison of their size of particles.

Q.

Identify the colloids from the following:

Soda water, sponge, clouds, a mixture of water and alcohol, jelly

Q. Why can't we call dispersed phase and dispersed medium as solute and solvent respectively?

Q.

Out of the given four mixtures, the one that appears clear and transparent is:

1. Chalk powder and water.

2. Sand and water.

3. Starch and water.

4. Sugar and water.

Q.

Arrange true solutions, suspension and colloid in the decreasing order of the size of the particles?

Q.

Size of colloidal particle varies from:

1. ${10}^{-7}\mathrm{to}{10}^{-9}\mathrm{cm}$

2. ${10}^{-9}\mathrm{to}{10}^{-17}\mathrm{cm}$

3. ${10}^{-5}\mathrm{to}{10}^{-7}\mathrm{cm}$

4. ${10}^{-4}\mathrm{to}{10}^{-10}\mathrm{cm}$

Q.

In foam, dispersion medium is ___ and dispersed phase is ___ respectively.

1. Liquid, gas

2. Gas, liquid

3. Liquid, solid

4. Solid, liquid

Q.

Examples of lyophilic colloids are

1. Albumin

2. RBC

3. Smoke

4. Metasulphide

Q. Arrange true solution, colloidal solution, and suspension in the decreasing order of their particle size.

1. Suspension > Colloid > True solution
2. Suspension > True solution > Colloid
   
3. Colloid > Suspension > True solution
   
4. True solution > Colloidal > Suspension
   

Q.

Which of the following pair is analogous to each other?

1. Solute – Dispersed medium, Solvent – Dispersed phase

2. Solute – Dispersed phase, Solvent – Dispersed medium

3. None of these

4. Solute – Dispersed medium, Gaseous – Dispersed phase

Q.

Give one word/a few words for:

Zig-zag movement of small particles.

Q. Which of the following groups contains all the colloidal systems having liquid as dispersed phase?

1. Fog, Starch sol, Foam
2. Milk, Cheese, Gold sol
3. Fog, Milk, Jelly
4. Butter, Whipped cream, Foam

Q. Sate three differences between suspensions and colloids.

Q. Match the following and choose the correct option.

Types of colloids	Examples
a. Emulsion	i. Clouds
b. Gel	ii. Milk
c. Aerosol	iii. Whipped cream
d. Foam	iv. Butter

1. a(ii), b(i), c(iv), d(iii)
2. a(ii), b(iv), c(i), d(iii)
3. a(i), b(ii), c(iii), d(iv)
4. a(iv), b(iii), c(ii), d(i)

Q.

What are the physical states of dispersed phase and dispersion medium of froth?

Q. Colloidal state is homogeneous in nature.

1. true
2. false

Q. Egg albumin is :

1. Lyophilic colloid
2. Reversible colloid
3. Protective colloid
4. All

Q. Arrange the following in decreasing order of their solute size:
Colloids, Suspension, True solution

1. True solution> Suspension > Colloids
2. Suspension > True solution > Colloids
3. True solution > Colloids > Suspension
4. Suspension > Colloids > True solution

Q. (4) Write the dispersed phase and dispersion medium of butter.