Advertisements
Advertisements
प्रश्न
The smallest unit of matter that exists freely in nature is called ...........
Advertisements
उत्तर
The smallest unit of matter that exists freely in nature is called molecule.
APPEARS IN
संबंधित प्रश्न
In a beam of sunlight entering a room, we can sometimes see dust particles moving in a haphazard way in the air. Why do these dust particles move?
When extremely small particles X derived from the anther of a flower were suspended in a liquid Y and observed through a microscope, it was found that the particles X were moving throughout the liquid Y in a very zig-zag way. It was also observed that warmer the liquid Y, faster the particles X moved on its surface.
- What could particles X be ?
- What do you think liquid Y is ?
- What is the zig-zag movement of X known as ?
- What is causing the zig-zag movement of particles X ?
- Name the scientist who discovered this phenomenon.
- What does this experiment tell us about the nature of liquid Y?
Define a compound. Give two points of evidence to show that sodium chloride is a compound.
Name a non-metal :
- which is lustrous
- which is required for combustion
- whose one of the allotrophic forms is a good conductor of electricity. Name the allotrope.
- other than carbon which shows allotropy
- which is known to form the largest number of compounds
Define solute.
You have been given a suspension and a solution. How could you tell the difference between them by their appearance ?
Name the process which can be used to purify an impure sample of copper sulphate.
Describe a method to separate a mixture of camphor and sand.
Solid is an arrangement of particles ______.
Higher the temperature, the higher the kinetic energy of particles.
