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प्रश्न
Which of the following are matter?
Chair, air, love, smell, hate, almonds, thought, cold, lemon water, smell of perfume.
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उत्तर
Chair, air, smell, almonds, lemon water and smell of perfume.
Notes
Note: The sense of smell is not matter. However, the smell or odour of a substance is classified as matter. The smell of any substance (say, perfume) can be classified as matter. This is because, perfume is in liquid state inside the bottle. It comes out in the form of tiny droplets. These droplets of perfume are matter and spread out in the atmosphere to create a sense of smell. This smell can be detected by our olfactory system.
संबंधित प्रश्न
Fill in the blank:
The change of water vapour into water is called ......................
Give two example of the following:
The substances which do not change their state on heating.
What do you observe when a gas jar which appears empty is inverted over a gas jar containing Bromine vapours? Name the phenomenon.
Write true or false for statement. Rewrite the false statement correctly.
Solids and liquids can flow.
A substance which can change its state
- wood
- oxygen
- paper
- cloth
Gases
- cannot be compressed easily,
- occupy the entire space of the container.
- have definite shapes.
- cannot flow.
What is mass ?
Explain why, we can easily move our hand in air but to do the same through a plank of wood, we need a karate expert.
Give a reason why solids and liquids co-exist at their melting points.
‘Inter-particle attraction between atoms of gases is very weak’. State five properties of gases which correlate as a consequence of the weak inter-particle attraction between particles of gases.
