Colloidal Solutions

Q.

What is Tyndall effect?

Q.

What is a colloidal solution?

Q.

What is the size of colloidal particles?

Q.

Explain what are multimolecular colloids, macromolecular colloids and associated colloids?

Give the difference between them.

Q.

Is Milk an Emulsion?

Q.

What is the difference between solutions and colloids ?

Q.

Solution of soap in water is a :

1. True solution

2. Colloidal solution

3. Suspension

4. None of the above

Q.

A homogeneous mixture of two or more substances is called __________.

Q.

Explain the terms in detail : Lyophillic colliods and Lyophobic colloids.

Give a brief set of difference between them.

Q.

The colloidal dispersion of a liquid in gas is called ________.

Q.

State whether colloidal solutions are homogeneous or heterogeneous.

Q.

Classify the following into true solutions and colloidal solutions :

Ink, Salt solution, Starch solution, Blood, Sugar solution

Q.

Which of the following forms a colloidal solution in water?

1. Starch

2. Glucose

3. Urea

4. ${\mathrm{BaSO}}_4$

Q. Question 4 (c)
Explain the following giving examples.
c. Colloid

Q.

Gold sol is an example of:

Q. Question 17
Smoke and fog both are aerosols. In what way are they different?

Q.

Why can we not use filter paper to filtrate the colloidal solution?

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

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

Q.

On the basis of composition of matter, milk is considered to be :

(a) a pure substance (b) an impure substance (c) an element (d) a compound

Q. Silver nitrate is very soluble in water.
1. If one gram of silver nitrate is added in 9 ml of water the volume of solution is 9. 2 ml

2. if 2 gram of silver nitrate is added in 8 ml of water then the volume of solution is 8. 4 ml

3. Is 3 gram of silver nitrate is added in 7 ml of water when the volume of solution in 7. 6 ml.

according to the volumes of the solution obtained by dissolving various masses of silver nitrate in various volumes of water at room temperature find
Q 25 gram of silver nitrate when dissolved in 50 ml of water what would be the final volume

Q.

When light is passed through water containing a few drops of milk, it shows a bluish tinge. This is due to the _____ of light by milk and the phenomenon is called _____. This indicates that milk is a _____ solution.

Q.

Define Aerosol.

Q.

Sand in water is an example of ______________ . (suspension/colloid).

Q. Question 25
Fill in the blanks
(a) A colloid is a mixture and its components can be separated by the technique known as___.
(b) Ice; water and water vapour look different and display different ___ properties but they are ___ the same.
(c) A mixture of chloroform and water are taken in a separating funnel is mixed and left undisturbed for some time. The upper layer in the separating funnel will be of ___ and the lower layer will be that of ______ and the lower layer will be that of____.
(d) A mixture of two or more miscible liquids, for which the difference in the boiling points is less than 25 K can be separated by the process called ___.
(e) When light is passed through water containing a few drops of milk, it shows a bluish tinge. This is due to the ___ of light by milk and the phenomenon is called ___. This indicates that milk is a ___ solution.

Q.

In beaker A, sugar cubes are dissolved into water while in beaker B, crushed cubes are taken. In which beaker, the rate of dissolution is faster and why? [2 MARKS]

Q.

What is the difference between a true solution and colloidal solution?

Q.

A colloidal solution of a liquid dispersed in a solid is called gel.

1. True
2. False

Q.

Is urea a colloid?

Q.

Milk is a colloidal solution.

1. True
2. False

Q.

Milk is an example of a type of matter called?

1. Solution

2. Homogeneous mixture

3. Heterogeneous mixture

4. None of these