Question

3. Brownian motion and
5. Condensation and deposition
& mund the given experiment carefully. Identify the incorrect parts of the experiment.
To show that a liquid expands on heating and contracts on cooling
• Take a beaker and fill it with coloured water.
Close the mouth of the beaker using a lid.
• Fix a capillary steel tube through a hole in the lid. The tube should be dipped in water.
Check and note the water level in the capillary tube.
• Now heat the beaker by placing it in a water bath.
You will observe that the level of the coloured water drops down in the capillary tube.
This shows that liquid does not expand on heating.​

Answer 1

Answer:

zig zag movment of particle called Brownian motion

Answer 2

Answer:

Brownian Motion :

The continuous random movement of colloidal particles is known as Brownian Motion.

BROWNIAN movement was named after Robert Brown, a biologist. He observed the motion of the particles in suspension of pollen grains in water.

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