Page 74 - ICSE Chemistry 6

Review Your Learning

A. Answer in one word.
1. The force with which molecules a ract each other _______________________
2. The process by which a liquid changes into its vapour form _______________________
3. A type of vaporiza on that occurs at all temperatures _______________________

4. A type of vaporiza on that occurs when a liquid is heated _______________________
5. The process by which a gas changes into a liquid _______________________
6. The constant temperature at which a liquid changes into a gas _______________________

B. Identify the error in the given statements. Circle the incorrect word and write the correct
word in the blank.
1. An atom has an independent existence. __________
2. Ma er exists in four states. __________

3. Gases possess high density. __________
4. Liquids are free fl owing because the molecules are ghtly packed. __________
5. The constant temperature at which a gas changes into a liquid is called mel ng point. __________
6. Sublime is the solid obtained on cooling the liquid. __________

C. Match the columns.
Column A Column B

1. Mass (a) Highly compressible
2. Resistance (b) Gaseous state of a solid
3. Atom (c) Force opposing mo on
4. Gases (d) Smallest possible unit of ma er

5. Sublime (e) Measure of quan ty of ma er
D. Explain the following terms.

1. Solidifi ca on 2. Evapora on 3. Boiling point 4. Deposi on 5. Chemical change

E. Answer the following questions.
1. With the help of an ac vity show that ma er occupies space.
2. Write a note on the molecular arrangement in diff erent states of ma er.
3. Write the proper es of solids.
4. What do you understand by Brownian movement? Explain with the help of an example.

5. How does a solid change into a gas? Explain with the help of an example.
6. With the help of an ac vity show that a gas expands on hea ng.

PROJECT

Create a presenta on on the topic ‘Expansion of Ma er’. Add related informa on, images and videos using
the Internet. Format the presenta on as per your choice.

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