1. How do you extract metals at the top of the activity series? (AS1) 4 Marks
2. How do you extract metals in the middle of activity series? (AS1) 4 Marks
3. How do you extract metals at the bottom of the activity series? (AS1) 4 Marks
4. Explain about an ore. Mention the types of ores and give examples for each. (AS1) 4 Marks
5. Fill up the following table using the given ores Bauxite, Copper Iron pyrites, Zinc blend, Magnesite, Magnetite, Cinnabar, Rocksalt, Zincite, Epsom salt, Galena, Gypsum, Hornsilver, Haematite, Lime-stone, Carnallite, Pyrolusite. (AS4) 4 Marks
Oxides Carbonates Sulphides Chlorides Sulphates
Oxides |
Carbonates |
Sulphides |
Chlorides |
Sulphates |
|
|
|
|
|
6. What are the differences between ores and minerals? (AS1) 2 Marks
7. Compare Roasting and Calcination? (AS1) 2 Marks
8. What are the differences between blast furnace and reverberatory furnace. (AS1) 2 Marks
9. A + BSO4 →ASO4 + B
B + A SO4 → No reaction
In the above reaction A and B are two elements, which element is more reactive? Why? (AS2) 2 Marks
10. ''Every ore is a mineral. But every mineral is not an ore" Explain. (AS1) 2 Marks
11. Write the equations for the reactions which take place in the blast furnace. (AS1) 2 Marks
12. Corrosion is a serious problem. What steps can be taken to prevent this damage. (AS6) 2 Marks
13. Find out the magnetic and non-magnetic wheels in the figure given below. (AS 5) 2 Marks
17. Which metal is used in preparation of Amalgam? (AS6) 1 Mark
18. Suggest few methods used for purification of metals. (AS1) 1 Mark
19. Which method is used for the extraction of metals high reactivity like Sodium, Magnesium. (AS1) 1 Mark
20. Explain the extraction of Hg metal which is at the bottom of the activity series? (AS1) 1 Mark