Extraction of metals

The position of metal M in the reactivity series is shown.

K, Na, M, Al, Zn, Fe, Pb, Cu, Ag

Which method will be used to extract M from its ore?

• electrolysis of its molten oxide

• electrolysis of its aqueous sulfate

• reduction of its oxide by heating with hydrogen

• reduction of its oxide by heating with coke

Scrap iron is often recycled.

Which reason for recycling is not correct?

• It reduces the amount of pollution at the site of the ore extraction.

• It reduces the amount of waste taken to landfill sites.

• It reduces the need to collect the scrap iron.

• It saves natural resources

Which element can only be extracted from its ore using electrolysis?

• calcium

• copper

• lead

• silver

Caesium is a metal that is more reactive than aluminium.

Which reaction would produce caesium?

• electrolysing aqueous caesium chloride

• electrolysing molten caesium chloride

• heating caesium carbonate

• heating caesium oxide with carbon

Which statement is not a reason for the importance of recycling aluminium?

• Aluminium is a rare metal in the Earth’s crust.

• The demand for aluminium continues to rise annually.

• The extraction of aluminium from its ore is expensive.

• The properties of aluminium make it one of the most useful of all metals.

How can sodium be manufactured?

• by electrolysing aqueous sodium chloride

• by electrolysing aqueous sodium hydroxide

• by electrolysing molten sodium chloride

• by heating sodium oxide with carbon

Which metal has to be extracted from its ore by electrolysis?

• Fe

• Na

• Pb

• Zn

Some metals and the compounds in their ores are shown.

Which type of reaction occurs in the extraction of each of these metals from their ore?

• decomposition by heat

• electrolysis

• precipitation

• reduction

Copper(II) oxide reacts with carbon when heated.

2CuO + C --> 2Cu + CO₂

Which statement about this reaction is correct?

• Carbon is the oxidising agent.

• Carbon is the reducing agent.

• Copper(II) oxide is oxidised.

• Copper(II) oxide is the reducing agent.

The list shows the position of metal X in the reactivity series of metals.

Na Al Fe X Cu Ag

Which methods could be used to extract metal X?

1 electrolysis of the solid metal oxide

2 heating the metal oxide with carbon

3 heating the metal oxide with copper

• 1, 2 and 3

• 1 and 2 only

• 2 only

• 2 and 3 only