Question

Which of the following apply to colloids. Select all that apply.

1. A colloid is a mixture intermediate between heterogeneous and homogenous.
2. Colloids cannot be separated by filtration.
3. Colloids can be seen using an optical microscope.
4. Fog and smoke are examples of colloids.
5. The Tyndall effect is a test to determine whether or not a mixture is a colloid.

Answer 1

Answer:

1,3,4

Explanation:

A colloid is a mixture intermediate between heterogeneous and homogenous.

Colloids can be seen using an optical microscope

Fog and smoke are examples of colloids.

Answer 2

Statements that are true about colloids are- 2, 3, 4 and 5.

Properties of colloids are-

• Colloids are heterogeneous mixtures in which solute is called dispersed phase and solvent is called dispersion medium.
• As the particles size of colloids is very small, it passes through filter paper.
• We cannot see particles through the naked eye. However, with the help of an optical microscope, we can see colloid particles.
• A unique property of colloidal solution is that it shows Tyndall effect. This property is used to check whether a mixture is a colloid or not.
• Fog, smoke, gelatin etc. are examples of colloids.