Colloids

Q. What is/are the difference between a colloid and a solution?

1. The particles of a colloid are larger
2. The particles of a colloid are smaller
3. The colloids scatter a beam of light while a solution does not
4. Particles of the solution settle after some time but not for colloids

Q. How many phases are present in a colloidal solution?

1. 2
2. 3
3. 1
4. 4

Q. A colloid is a homogeneous mixture.

1. True
2. False

Q. Which type of colloids do not exist?

1. A solid phase dispersed throughout another solid phase
2. A liquid phase dispersed throughout another liquid phase
3. A gaseous phase dispersed throughout another solid phase
4. A gaseous phase dispersed throughout another gaseous phase

Q. Identify the true and false statement(s).
Statement I: Liquid mixtures like milk and blood can be called solutions.
Statement II: The solvents in a solution are always in a liquid state

1. True, True
2. True, False
3. False, False
4. False, True

Q. Milk is an example of a.

1. colloid
2. true solution
3. suspension

Q. Identify heterogeneous mixtures which cannot be separated by filtration.

1. Jelly
2. Cheese
3. Curry
4. Smoke
5. Salt solution
6. Sugar solution
7. Sand and water
8. Milk

Q. What technique can be used to distinguish between a suspension and a colloid?

1. By heating the mixture to boiling
2. By illuminating them by a beam of light to observe scattering of light
3. By freezing the mixture to a solid state
4. By shaking and observing the components if they separate

Q.

Which characteristic is true with respect to colloids?

1. They are only in liquid state.

2. They always have two phases.

3. They can’t be electrolysed.

4. They are only hydrophilic.

Q.

When we add water to milk, they get mixed properly because:

1. Particles of milk attract the particles of water

2. Particles of water get in between particles of the milk.

3. Particles of milk and water move in a continuous motion.

4. Particles of milk repel particles of water.