Types of Mixtures Based on Particle Size

Q. Identify the correct statement(s) with respect to a suspension and a colloidal solution:

1. In a suspension, the particles cannot be seen with the naked eye whereas in a colloidal solution, they can be.
2. In suspension, the particles can be seen with naked eye whereas in a colloidal solution, they cannot be.
3. Both can scatter light and make its path visible.
4. Only Suspension can scatter light and colloidal solutions cannot.

Q.

A suspension and a colloidal solution, both are heterogeneous mixtures. Identify the correct statement(s) referring to both types of solutions.

1. In a suspension, the particles cannot be seen with the naked eye whereas in a colloidal solution, they can be.

2. In suspension, the particles can be seen with naked eye whereas in a colloidal solution, they cannot be.

3. Both can scatter light and make its path visible.

4. Only Suspension can scatter light and colloidal solutions cannot.

Q. The cause of Brownian movement is:

1. Impact of molecules of dispersion medium on colloidal particles.
2. Attractive forces between particles of the dispersed phase and dispersion medium.
3. Convection current.
4. Heat changes in liquid state.

Q.

What is a combination of substances called which remain intact with each other in any proportion?

1. Mixture

2. Chemical Inducement

3. Ionic

4. Atomic

Q. Choose the correct option for a mixture.

1. New compound is formed
2. Constituents are not easily seperable
3. Shows different properties from constituents
4. They have a variable composition

Q. Arrange the following in the decreaing order of their particle size:
suspension, true solution and colloids

1. Suspension > Colloidal > True solution

2. Suspension > True solution > Colloidal

3. True solution > Suspension > Colloidal

4. True solution > Colloidal > Suspension

Q. White gold used in jewellery contains two elements, gold and palladium. A jeweller has two different samples of white gold that are both identical in appearance and have a uniform composition throughout. What can be said about the samples?

1. They are homogeneous mixtures and be classified as metallic alloys
2. The materials are heterogeneous mixtures and can be classified by their components
3. The samples are heterogeneous mixtures that can be separated using magnetic properties.
4. The samples have variable compositions and are classified as metallic solutions.

Q. Which of the following is a mixture?

1. Salt
2. Sulphur powder
3. Iron rod
4. Iron particles & sand