1. Electricity is not considered matter. Why?
2. We can hold liquids in our hands. True or false? Explain.
3. Gases have no definite shape or volume. Explain.
4. We cannot move our fingers through a solid wall. Do you agree? Give reason.
5. Why are liquids and gases called fluids?
6. We can smell a perfume from several metres away. Explain.
7. Gases expand much more than solids or liquids on heating. Why?
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Answers
Answer:
1. Since electricity does not occupy space and have no mass, hence it is not considered as matter.
Explanation:
2. No, as liquids have the ability to flow , they will flow away from our hands .
3. Molecules of gases are in constant rapid motion, hence they have lot of voids between them due to which they don't have definite shape and volume.
4. Yes, As molecules of solids are tightly packed and have almost no intermolecular spaces, hence we can't move our fingers through solids.
5.They have the ability to flow due to which they are called fluids.
6. Since gases show diffusion, particles of gases can move from one place to another quickly due to which we are able to smell perfumes fromseveral metres away.
7. Gases have very less intermolecular forces of attraction b/w them as compared to solids and gases; due to which if heat is applied to them. They will move away from each other easily and hence expand more than other states of matter on heating.
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