Metals

Iron is extracted from its ore (hematite) in the blast furnace. Which gas is produced as a waste product?

• Carbon Dioxide

• Hydrogen

• Nitrogen

• Oxygen

Iron is extracted from hematite in a blast furnace. Which reaction increases the temperature in the blast furnace to over 1500°C?

• calcium carbonate → calcium oxide + carbon dioxide

• calcium oxide + silicon dioxide → calcium silicate

• carbon + oxygen → carbon dioxide

• carbon dioxide + carbon → carbon monoxide

Four reactions that take place in the blast furnace to produce iron are shown. Which reaction is used to keep the furnace hot?

• C + O2 → CO2

• CO2 + C → 2CO

• Fe2O3 + 3C → 2Fe + 3CO

• Fe2O3 + 3CO → 2Fe + 3CO2

Which substance is not involved in the extraction of iron from hematite?

• Carbon

• Carbon Monoxide

• Calcium Carbonate

• Nitrogen

Which statement is incorrect?

• Carbon dioxide is a waste product in the extraction of iron.

• Carbon monoxide is a reducing agent.

• The extraction of iron from hematite involves reduction.

• When iron is converted into steel, oxygen is used to oxidise the iron.

Iron is extracted from its ore in a Blast Furnace. Hematite, coke, limestone and hot air are added to the furnace. Which explanation is not correct?

• Coke burns and produces a high temperature.

• Hematite is the ore containing the iron as iron oxide.

• Hot air provides the oxygen for the burning.

• Limestone reduces the iron oxide to iron.

Which statement about the extraction of iron from its ore is correct?

• Iron is more difficult to extract than zinc.

• Iron is more difficult to extract than copper.

• Iron is easy to extract because it is a transition metal.

• Iron cannot be extracted by reduction with carbon.

Many metals are extracted from their ores by heating the metal oxide with carbon. Which metal cannot be extracted using this method?

• Aluminium

• Copper

• Iron

• Zinc

Some metals react readily with dilute hydrochloric acid. Some metals can be extracted by heating their oxides with carbon. For which metal are both statements correct?

• Calcium

• Copper

• Iron

• Magnesium

1 Which statement about the uses of metals is correct?

• Aluminium is used in the manufacture of aircraft because of its strength and high density.

• Copper is used in electrical wiring because of its strength and high density

• Mild steel is used in the manufacture of car bodies because of its strength and resistance to corrosion

• Stainless steel is used in the construction of chemical plant because of its strength and resistance to corrosion.