An iron nail is added to aqueous copper(II) sulfate and a different iron nail is added to aqueous magnesium sulfate. The results are shown. Which statement is correct?

Copper atoms are oxidised more easily than magnesium atoms.

Copper atoms are reduced more easily than iron ions.

Iron atoms are oxidised more easily than copper atoms.

Iron atoms are reduced more easily than copper ions.

Chemistry

IGCSE&ALevel

CAIE

Exam No：0620_s24_qp_21 Year：2024 Question No：32

Answer:

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

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