Gels and emulsions

Q.

Vinegar dissolves in water. State whether the statement is True (or) False.

1. True
2. False

Q.

What are colloidal solutions? Give one example of the following types of colloids:

(i) Liquid dispersed in gas.

(ii) Gas dispersed in liquid.

(iii) Liquid dispersed in solid.

(iv) Liquid dispersed in liquid.

(v) Solid dispersed in gas.

Q.

Emulsion is a colloidal solution of liquid in :

1. Solid

2. Liquid

3. Gas

4. Air

Q.

What is the nature of the solution formed by mixing mustard oil and water?

Q. Butter is an example of :

1. true solution
2. sol
3. gel
4. suspension

Q. Which among the following is an example of gel?

1. Smoke
2. Cheese
3. Milk
4. Fog

Q.

What are the physical states of dispersed phase and dispersion medium of a jelly, cheese and butter?

1. Dispersed phase: solid, dispersed medium: liquid

2. Dispersed phase: gas, dispersed medium: solid

3. Dispersed phase: liquid, dispersed medium: solid

4. Dispersed phase: gas, dispersed medium: solid