Question

CHECK POINT 4
1. Define a colloidal solution.
2. Is whipped cream a colloid? If yes, what type?
3. Classify the following into true solution, colloid and suspension:
sodium chloride in water, oil in water, sand in water, milk, copper sulphate dissolved in water, fog
4. Will milk show Tyndall effect? If so, why?
5. Why does a true solution not show Tyndall effect?
6. Name the type of colloid in each of the following giving an example of each.
Dispersed phase Dispersion medium
A.
Liquid
Gas
B.
Liquid
Liquid
C.
Liquid
Solid​

Answer 1

Answer:

2. Is whipped cream a colloid? If yes, what type?

3. Classify the following into true solution, colloid and suspension:

sodium chloride in water, oil in water, sand in water, milk, copper sulphate dissolved in water, fog

4. Will milk show Tyndall effect? If so, why?

5. Why does a true solution not show Tyndall effect?

6. Name the type of colloid in each of the following giving an example of each.

Dispersed phase Dispersion medium

A.

Liquid

Gas

B.

Liquid

Liquid

C.

Liquid

Solid

Answer 2

Answer:

1. A mixture in which one substance is divided into minute particles (called colloidal particles) and dispersed throughout a second substance. ... The mixture is also called a colloidal solution, colloidal system, or colloidal dispersion. The three forms in which all matter exists are solid, liquid, or gas.

2. Whipped cream is a colloid. It consists of a gas in a liquid, so it is a foam. Sol is a colloidal suspension with solid particles in a liquid. The light is reflected off the large particles and spread out.

3. chloride in water is the solution, fog is colloid, oil in water is a suspension.

4. Milk is a colloidal solution. The particles of a colloidal solution are large enough to scatter a beam of light through it which makes it's path visible. This shows that milk shows the Tyndall Effect.

5. When a beam of light is passed through true solution, then the path of light is invisible due to fact that the size of particles in true solution is below 1 nm, so they cannot scatter the light that means cannot show Tyndall effect.

6. Aerosol, for example: Clouds

(b)Emulsion, for example: Butter

(c)Gel, for example: Jelly

7. B is the correct option

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Explanation: