CIE iGCSE Co-Ordinated Science C9.6 Extraction of metals Exam Style Questions Paper 1
Question
What are the products of the thermal decomposition of calcium carbonate, CaCO₃?
A. Calcium and carbon dioxide
B. Calcium, carbon, and oxygen
C. Calcium oxide and carbon dioxide
D. Calcium oxide and carbon monoxide
▶️Answer/Explanation
Answer: C
Explanation: When calcium carbonate is heated, it decomposes into calcium oxide (CaO) and carbon dioxide (CO₂).
Question
Bauxite is the main ore of aluminium. Which method is used to extract pure aluminium from bauxite?
A. Fractional distillation
B. Electrolysis
C. Neutralisation
D. Thermal decomposition
▶️Answer/Explanation
Answer: B
Explanation: Aluminium is extracted from bauxite using electrolysis. This process involves passing an electric current through molten aluminium oxide to separate the aluminium metal.
Question
Which metal is extracted from its ore by heating with carbon?
A copper
B magnesium
C potassium
D sodium
▶️Answer/Explanation
Ans :A
Question
The diagram shows a metal being extracted from its powdered ore using carbon.
What happens to the ore in this reaction?
A It burns.
B It decomposes.
C It is oxidised.
D It is reduced.
▶️Answer/Explanation
Ans 😀