Chemistry, asked by tripathysashi1970, 6 months ago

Matter
9.
(a) Gaseous to liquid
(c) Solid to liquid
(b) Liquid to gaseous
(d) Liquid to solid
1. Describe how ice, water and water vapour can be changed into one another.
2. Explain why a solid does not flow, but a liquid does.
3. Explain why a liquid has a fixed volume but not a fixed shape.
4. Explain why a liquid expands and contracts on being heated and cooled respectively.
6. Explain how, on being heated, a solid changes to a liquid and a liquid forms a gas.
7. Describe an experiment to show sublimation.
8. What do you mean by Brownian movement? Why does it take place?
Objective Questions
Choose the correct option.
Which of the following substances is not miscible with water?
(d) Oil
8. Why do gases diffuse into each other?
What are the following changes in state called?
10. Name a substance that sublimes.
Long-Answer Questions
5. Describe an experiment to show that a gas expands on being heated and contracts on cooling.

Answers

Answered by s02371joshuaprince47

Answer:

9 a) Evaporation

b) Meliting

c) freezing

1)When heat (a form of energy) is added, the ice melts into liquid water. It has reached its melting point – 0°C. Continue to apply heat, and the water will turn into water vapour, which is water in its gaseous state. ... If heat is removed from water vapour, the gas cools down and it condenses back into liquid water.

2)In solids there is a strong force of attraction between the molecules and the space between them is very negligible. ... They do not attract each other as strongly as the molecules of solids. Thus, the intermolecular spaces are larger and the molecules are able to move about more freely. This makes a liquid flow.

3)In a liquid, the particles are still in close contact, so liquids have a definite volume. ... However, because the particles can move about each other rather freely, a liquid has no definite shape and takes a shape dictated by its container.

4)As the molecules of a liquid are cooled they slow down. As the molecules slow down they take up less volume. Taking up less room because of the molecules lower energy causes the liquid to contract.

6)Usually when solids are heated they melt and becomes liquid. Then on further heating the liquid boils to form a gas. When we keep a piece of ice in a dish it melts and the water so formed evaporates after sometime.

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Answered by dongcarlvincent

Answer:

(a) Gaseous to liquid

(b) Liquid to gaseous

(d) Liquid to solid

1. Describe how ice, water and water vapour can be changed into one another.

2. Explain why a solid does not flow, but a liquid does.

3. Explain why a liquid has a fixed volume but not a fixed shape.

4. Explain why a liquid expands and contracts on being heated and cooled respectively.

6. Explain how, on being heated, a solid changes to a liquid and a liquid forms a gas.

7. Describe an experiment to show sublimation.

8. What do you mean by Brownian movement? Why does it take place?

Objective Questions

Choose the correct option.

Which of the following substances is not miscible with water?

(d) Oil

8. Why do gases diffuse into each other?

What are the following changes in state called?

10. Name a substance that sublimes.

Long-Answer Questions

5. Describe an experiment to show that a gas expands on being heated and contracts on cooling.

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