Page 47 - Science Class 08

6. the reac on in which one metal displaces another : ______________________
7. the capacity of a metal to react : ______________________

8. the quality of being beaten into sheets : ______________________
9. the quality of being drawn into wires : ______________________
10. the wearing away of a metal due to compound forma on : ______________________

11. the type of corrosion that is less severe and mild : ______________________
12. the quality of ringing on being struck : ______________________
C. Write one word for each of the following.
1. a compound of a metal and sulphur : ____________________

2. metals made of silicon and oxygen : ____________________
3. the science that studies metals and their proper es : ____________________
4. the common metal that melts at 1535°C : ____________________

5. the metal that has best conduc vity : ____________________
6. the metal that can replace another metal from a compound : ____________________
7. the metal that is useful for blood-cells : ____________________
8. the name given to the process of corrosion : ____________________

9. two things essen al for corrosion to occur : ____________________
D. Name.
1. four proper es of minerals:
_____________ _____________ _____________ _ ____________

2. nine physical proper es of metals:
_____________ _____________ _____________
_____________ _____________ _____________
_____________ _____________ _____________

3. five ways of preven ng corrosion of metals:
_____________ _____________ _____________
_____________ _____________

E. Match the following columns.
Column I Column II
1. Fuels a. Removal of moisture
2. Free metals b. More ac ve metals

3. Concentra on c. Sounding on being struck
4. Sonority d. Buried organic ma er
5. Replacement e. Gangue

F. Fill in the blanks.
1. Local corrosion is far ______________________ than uniform corrosion.
2. Fe + CuSO₄ Õ________________________________________________ .

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