The document describes experiments with potassium manganate (KMnO4), milk, and chalk mixed with water. KMnO4 and milk solutions showed that particles did not settle, the path of a light beam was visible, and particles could not be filtered, indicating they are colloids. Chalk particles settled, the light path was visible, and particles could be filtered, showing it is a suspension. The key properties of colloids and suspensions are summarized.

2. Keeping the beaker undisturbed
KMnO4 + Water Particles do not settle down
Milk+ Water Particles do not settle down
Chalk + Water Particles settle down

3. KMnO4 + Water Path of beam is not visible
Milk + Water Path of beam is visible
Chalk +Water Path of beam is visible
Passing a beam of light

4. Filtering Using Filter Paper
KMnO4 + Water
Milk + Water
Chalk + Water
Particles cannot be
filtered
Particles cannot be
filtered
Particles can be
filtered

5. 1. Particles do not settle down
2. Path of light beam is not visible when
an intense beam of light passed
3. Particles cannot be separated by
filtration
True Solution

6. Colloid
1. Particles do not settle down
2. Path of light beam is not visible when an
intense beam of light is passed through it
3. Particles cannot be separated by filtration

7. Suspension
1. Particles settle down
2. Path of light beam is visible when an intense
beam of light passed through it.
3. Particles can be separated by filtration