Which statement about aluminium is correct?
A.
Aluminium is easy to extract from its ore because it is near the bottom of the reactivity series.
B.
Aluminium is formed when aluminium oxide is heated with carbon.
C.
Bauxite is an important ore of aluminium.
D.
Hematite is an important ore of aluminium.
Exam No：0620_s24_qp_12 Year：2024 Question No：29
Answer:
C
Knowledge points:
9.6.1. Describe the ease in obtaining metals from their ores, related to the position of the metal in the reactivity series
9.6.2.1. the burning of carbon (coke) to provide heat and produce carbon dioxide
9.6.2.2. the reduction of carbon dioxide to carbon monoxide
9.6.2.3. the reduction of iron(III) oxide by carbon monoxide
9.6.2.4. the thermal decomposition of calcium carbonate / limestone to produce calcium oxide
9.6.2.5. the formation of slag Symbol equations are not required
9.6.3. State that the main ore of aluminium is bauxite and that aluminium is extracted by electrolysis
9.6.4.1.
9.6.4.2.
9.6.4.3.
9.6.4.4.
9.6.4.5.
9.6.5.1. the role of cryolite
9.6.5.2. why the carbon anodes need to be regularly replaced
9.6.5.3. the reactions at the electrodes, including ionic half-equations
Solution:
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