Page 52 - ICSE Chemistry 6

Review Your Learning

A. Answer in one word.
1. Substances that do not have uniform composi on ____________________
2. Substances made up of only one kind of molecule ____________________
3. Non-metals that do not react with other elements ____________________

4. Elements possessing proper es of both metals and non-metals ____________________
5. The smallest unit of an element ____________________

B. Identify the error in the given statements. Circle the incorrect word and write the correct
word in the blank.

1. A pure substance contains other substances also in trace amounts. ____________
2. Non-metals are malleable and duc le. ____________
3. Pla num is used to make fi laments of light bulbs. ____________

4. A mixture has fi xed mel ng and boiling points. ____________
5. In the process of evapora on, the solid component evaporates. ____________
C. Match the columns.

Column A Column B
1. Gold (a) Used as a fuel
2. Iron (b) Making utensils

3. Natural gas (c) Making non-s ck cookwares
4. Aluminium (d) Making jewellery
5. Plas c (e) Heavy tools and machinery

D. Explain the following terms.
1. Pure substances 2. Molecule 3. Non-metals 4. Compound 5. Evapora on

E. Answer the following questions.
1. Diff eren ate between atom and molecule.
2. Write the rules followed to assign symbols to elements.

3. With the help of an example, explain that the proper es of a compound are diff erent from those of
its cons tuent elements.

4. Write the characteris cs of mixtures.
5. Write a note on principle of separa on. Also, discuss the method used to separate a soluble solid
component from a liquid.

PROJECT

Create a PowerPoint presenta on on the topic ‘Separa on of Mixtures’. Discuss the various methods
taught in the lesson in detail. Add related informa on, images and videos using the Internet. Format the
presenta on as per your choice.

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