Worksheet Chapter 4: Reactivity of Metals

1. Compare the reactivity of Zinc and Lead towards oxygen, and describe the visual observations when both metals are strongly heated in air.

2. Write a balanced word equation for the thermal decomposition of calcium carbonate when heated strongly.

3. True or False: Aluminium oxide (bauxite) can be reduced to aluminium metal by heating it with carbon powder in a blast furnace.

4. Explain why carbon powder can be used to extract iron from hematite ($Fe_2O_3$), but cannot be used to extract magnesium from magnesium oxide ($MgO$).

5. True or False: In a blast furnace, slag floats above molten iron because slag has a lower density than iron.

6. Which non-metal element is situated between Aluminium and Zinc in the Reactivity Series of Metals?

7. Fill in the blank: Minerals that occur naturally as free elements because of their low chemical reactivity are known as ____________ minerals.

8. A student carries out three displacement experiments by heating metal oxide powders with carbon or passing hydrogen gas over them: Experiment A: Carbon + Zinc Oxide Experiment B: Carbon + Aluminium Oxide Experiment C: Hydrogen Gas + Copper(II) Oxide For each experiment, predict whether a reaction occurs, identify any products formed, and justify your answer based on the Reactivity Series.

9. Describe the main chemical reactions occurring in a blast furnace during iron extraction, including raw materials used and the formation of slag.

10. State the chemical names for the following natural minerals: (a) Bauxite, (b) Hematite.