Extracting Metals - Year 11

What is the primary resource from which copper is extracted?

• Iron sulphate solution

• Copper sulphate solution

• Malachite

• Copper-rich ores

Which method uses sulphuric acid to produce copper sulphate for extracting copper?

• Bioleaching

• Using sulphuric acid

• Electrolysis

• Smelting

What is the main purpose of smelting in copper extraction?

• To dissolve copper

• To create copper sulphate

• To heat copper ore and produce impure copper

• To purify copper

What percentage of copper is still produced by smelting?

• 80%

• 50%

• 60%

• 70%

What is malachite primarily composed of?

• Copper oxide

• Copper carbonate

• Copper sulphate

• Iron sulphate

What reaction occurs when iron nail is put in copper sulphate solution?

• Displacement reaction

• Combustion reaction

• Decomposition reaction

• Neutralization reaction

What is the role of bacteria in bioleaching?

• To act as electrodes in electrolysis

• To purify copper

• To smelt copper ore

• To feed on low-grade metal ores and produce leachate

What is the purpose of phytomining?

• To directly extract copper from the soil

• To grow plants that can absorb copper ions from soil

• To use plants as electrodes in electrolysis

• To smelt copper ore

How is copper extracted from the ash of burnt plants in phytomining?

• By electrolysis

• By smelting

• By adding sulphuric acid

• By adding water

What is the final step to obtain pure copper metal in the extraction process?

• Smelting

• Thermal decomposition

• Electrolysis

• Adding sulphuric acid