CIE iGCSE Co-Ordinated Science C9.6 Extraction of metals Exam Style Questions Paper 2
Question
Which statement about the extraction of metals is correct?
(A) Aluminium ore is called hematite.
(B) Aluminium is extracted from its ore by heating with carbon.
(C) Iron oxide is reduced to iron by heating with carbon monoxide.
(D) Limestone is used to remove basic impurities in a blast furnace.
▶️Answer/Explanation
Ans: C
Question
What is the word equation for the manufacture of lime?
(A) calcium carbonate → calcium hydroxide + carbon dioxide
(B) calcium carbonate → calcium oxide + carbon dioxide
(C) calcium sulfate → calcium hydroxide + sulfur dioxide
(D) calcium sulfate → calcium oxide + sulfur dioxide
▶️Answer/Explanation
Ans: B
Question
Which row identifies an ore of aluminium and the method of extraction of aluminium from its ore?
▶️Answer/Explanation
Ans: A
Question
Which substance is produced by the thermal decomposition of limestone?
(A) calcium
(B) calcium carbonate
(C) calcium hydroxide
(D) calcium oxide
▶️Answer/Explanation
Ans: D