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WorksheetsUses of metals
Total questions: 10
Worksheet time: 5mins
Many metals are extracted from their ores by heating the metal oxide from carbon.
Which metal cannot be extracted using this method?
aluminium
copper
iron
zinc
Iron is extracted from its ore (hematite) in the blast furnace.
Which gas is produced as a waste product?
carbon dioxide
hydrogen
nitrogen
oxygen
Which substance is not involved in extraction of iron from hematite?
carbon
carbon monoxide
calcium carbonate
nitrogen
In the extraction of aluminium, what compound of aluminium is used for the electrolyte?
aluminium oxide
aluminium sulfate
aluminium nitrate
aluminium sulfide
In aluminium extraction, the melting point of the electrolyte is lowered by adding (a)
Copper is a transition element used to make saucepans.
Which property is not correct for copper?
good conductor of heat
insoluble in water
low melting point
malleable
Which two elements make up mild steel?
aluminium & magnesium
copper & zinc
iron & carbon
tin & lead
Which statements is not correct?
aluminium - used in food container because of its resistance to corrosion
aluminium - used in manufacture of aircraft because of its strength and low density
mild steel - used in car bodies because of its strength and low density
stainless steel - used in chemical plant because of its strength and resistance to corrosion
What are the advantages of recycling metals? Select all correct options.
Conserves metals as they are finite resources.
Reduces waste and problems in its disposal.
Takes time to collect and sort waste metals.
Reduces pollution due to extraction activities.
