Calcium carbonate is a combination of :

• Calcium, carbon and nitrogen

• Calcium, hydrogen and nitrogen

• Calcium, oxygen and carbon

• Calcium, carbon and hydrogen

2. Reactivity of metal towards oxygen increases when going down the reactivity series of metal diagram.

• True

• False

4. The most reactive metal in the reactivity series of metals is ______________.

• Calcium

• Potassium

• Magnesium

• Aluminium

4. In a vigorous reaction between a more reactive metal such as magnesium and oxygen, a bright flame is observed

• True

• False

5. In a less vigorous reaction between a less reactive metal such as iron and oxygen, only a glow or slow change in colour is observed

• True

• False

6. Choose the correct sequence.

• Silver , Copper , Magnesium

• Iron , Lead , Mercury

• Magnesium , Aluminium , Calcium

• Iron , Carbon , Lead

7. Magnesium + oxygen = X

What is X ?

• Magnesium oxide

• Magnesium dioxide

• Magnesium trioxide

• Magnesium(IV) oxide

8. What are the two non-metal elements that are included in the reactivity series of metals? (Hint: Choose more than one answer).

• Calcium

• Carbon

• Sodium

• Hydrogen

9. If carbon can remove oxygen from a metal oxide, it means carbon is (more or less) reactive than the metal.

• more

• less

10. What is the common name of ferum oxide ?

• hematite

• pyrite

• calcite

• galena