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प्रश्न
When a beam of sunlight enters a room through a window, we can see tiny particles X suspended in a gas (or rather a mixture of gases) Y which are moving rapidly in a very haphazard manner.
- What could particles X be ?
- Name the gas (or mixture of gases) Y.
- What is the phenomenon exhibited by particles X known as ?
- What is causing the movement of particles X ?
- What conclusion does the existence of this phenomenon give us about the nature of matter ?
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उत्तर
- The particles, 'X' are dust particles.
- Gas 'Y' is Air.
- This phenomenon being exhibited by 'X' particles is called the Brownian motion.
- The fast moving air molecules are constantly hitting the tiny dust particles, causing them to move rapidly in a very haphazard manner.
- The gaseous matter ‘air’ is made up of tiny particles that are constantly moving.
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संबंधित प्रश्न
Define interconversion of states of matter. What are the two factors responsible for the change of states of matter?
Give two example of the following:
The substances which do not change their state on heating.
The state of matter which has no definite shape or volume is called
- solid
- liquid
- gas
- water
Define the following term of Molecule .
Give reason of When a teaspoon of sugar is added to half a glass of water and stirred, the water level in the glass does not rise.
State two characteristics of matter demonstrated by diffusion.
Which one of the following statement is correct in respect of fluids?
Define: interconversion of states of matter.
Differentiate the general properties of solids, liquids and gases in the form of a table — with reference to free diffusion.
Complete the statement by filling the blank with the correct word given below.
When inter-particle space increases, the inter-particle attractive force _______________.
