Question

with the help of an activity,show particle nature of matter.draw diagram.

Answer 1

1. Take about 50 cm3 water in a 100 cm3 beaker.
2. Mark the level of water.
3. Add some sugar to the beaker and stir with the help of a glass rod.
4. Observe the change in water level.
Fig. 4.1. Dissolution of sugar in water. In solution particles of sugar are present in the spaces between particles of water
It is observed that the crystals of sugar disappear. The level of water remains unchanged. These observations can be explained by assuming that matter is made up of small particles. On dissolution, the particles of sugar get distributed into the spaces between particles of water.
• The constituent particles of matter are extremely small in size
The following activity demonstrates that the constituent particles of matter are very small

Answer 2

Take water in a glass.Add a spoon of salt in the glass of water and stir.The salt will dissolve and the water will taste salty.The salt particles dissolve in water because they occupy the spaces between the particles of water in the glass.This results in spreading of salt particles throughout the particles of water in the glass.This experiment shows particle nature of matter.