Question

If you shine a flashlight through air in a darkened room, you can see that the
air is filled with tiny particles of dust. What would determine whether this dust is a
suspension or a colloid?

Answer 1

Answer:

Colloid

Explanation:

• If a flashlight is made to pàss through air in a darkened room, then the particles of dust can be seen in air.
• This is because of a phenomenon called ‘Tyndall effect’
• According to Tyndall effect, when a ray of light is pàssed through a colloidal solution, the solution scatters the light and path of light becomes visible.

Here the dust particles act as colloidal solution and scatter the flashlight.

Some other examples of Tyndall effect include:

1. Rays of Sunlight can be seen in a dense forest.
2. Path of light can be observed when light is pássed through milk.