Chemistry 0620 · IGCSE
Extraction of metals
100 practice questions on Extraction of metals, with worked solutions and instant marking.
Iron is obtained from iron oxide using carbon monoxide, as shown below. iron oxide + carbon monoxide $\rightarrow$ iron + carbon dioxide Which statement is correct?
Feb/March 2016
Iron is obtained from hematite in the blast furnace. Hematite contains silicon(IV) oxide (sand) as an impurity. What substance reacts with this impurity to remove it?
Feb/March 2016
Which reaction does not take place during the extraction of aluminium?
Feb/March 2016
Zinc is obtained from zinc blende by roasting it in air so that zinc oxide is formed. The zinc oxide is then heated with carbon to produce zinc. The equations for the reactions are shown. 1. $2\text{ZnS} + 3\text{O}_2 \rightarrow 2\text{ZnO} + 2\text{SO}_2$ 2. $\text{ZnO} + \text{C} \rightarrow \text{Zn} + \text{CO}$ Which statement concerning reactions 1 and 2 is not correct?
Feb/March 2016
Iron is obtained from hematite in a blast furnace. The hematite has silicon(IV) oxide (sand) present as an impurity. Which substance reacts with this impurity to eliminate it?
Feb/March 2016
Which substance gives sulfur dioxide when it is roasted in air?
Feb/March 2017
The diagram depicts a blast furnace used to extract iron. Text on the diagram: mixture of iron ore, coke and limestone (calcium carbonate); slag; molten iron.
Feb/March 2017
Four reactions occurring in the blast furnace to make iron are shown. Which reaction is used to maintain the temperature of the furnace?
Feb/March 2019
Which of the following statements about the extraction of metals is correct?
Feb/March 2019
Titanium is extracted from the ore rutile. Rutile is an impure form of titanium(IV) oxide, $\text{TiO}_2$.
Feb/March 2019
Aluminium is produced from bauxite by electrolysis. Which statement is correct?
Feb/March 2020
Iron is obtained by heating iron ore, limestone and coke (carbon) together in air inside a blast furnace. A diagram of the blast furnace is shown.
Feb/March 2020
Aluminium is obtained from its ore. The ore is first changed into pure aluminium oxide, and electrolysis is then carried out as shown. The diagram labels: power supply (+ and -), anodes, wires, cathode, electrolyte, and molten aluminium.
Feb/March 2020
The four equations below are given. 1 $\text{C} + \text{O}_2 \rightarrow \text{CO}_2$ 2 $\text{CaCO}_3 \rightarrow \text{CaO} + \text{CO}_2$ 3 $\text{SiO}_2 + 2\text{CO} \rightarrow \text{Si} + 2\text{CO}_2$ 4 $\text{Fe}_2\text{O}_3 + 3\text{CO} \rightarrow 2\text{Fe} + 3\text{CO}_2$ Which equations show reactions that occur during the extraction of iron from hematite?
Feb/March 2021
What is the purpose of cryolite in the extraction of aluminium from bauxite?
Feb/March 2021
During the extraction of iron from hematite, Coke (carbon) and limestone are both raw materials. When each one is heated in the process, which type of reaction takes place?
Feb/March 2023
Coke (carbon) and limestone are two of the raw materials involved in extracting iron from hematite. Which reaction type takes place when each substance is heated during this process?
Feb/March 2023
This question concerns iron.
Feb/March 2023
From its ore, which metal is obtained most readily?
Feb/March 2024
Within the blast furnace, the impurity silicon(IV) oxide is eliminated when slag is formed. Which equation shows the formation of the substance that reacts with silicon(IV) oxide to produce slag?
Feb/March 2024
Aluminium is obtained from bauxite using electrolysis. Which of the statements is correct?
Feb/March 2024
Iron ore contains iron(III) oxide, Fe2O3. Iron is obtained from Fe2O3 in a blast furnace. Some of the reactions taking place in the blast furnace are shown below. equation 1 C + O2 -> CO2 equation 2 CaCO3 -> CaO + CO2 equation 3 CaO + SiO2 -> CaSiO3
Feb/March 2024
Which line shows the symbol equation for the formation of carbon monoxide and for the reduction of iron(III) oxide in a blast furnace?
Feb/March 2025
Tin is a metal that is less reactive than iron, and it is obtained from its ore cassiterite, $\text{SnO}_2$. Which of the following statements about tin are correct?
May/June 2016
In making steel, iron from a blast furnace is reacted with oxygen and calcium oxide. Which substances in the iron are taken out?
May/June 2016
Iron is extracted from its ore in a blast furnace and then used to produce steel. Iron taken from the blast furnace contains ......1...... as an impurity. To remove this impurity, ......2...... is blown through the molten iron. ......3...... is also added so that the oxides of phosphorus and silicon are removed, as these are ......4...... . Which words complete the sentences about the conversion of iron to steel?
May/June 2016
During steel manufacture, iron from a blast furnace is treated with oxygen and calcium oxide. Which substances present in the iron are removed?
May/June 2016
Why is cryolite added when aluminium is extracted by electrolysis?
May/June 2016
Aluminium is obtained by electrolysis of a mixture of aluminium oxide and cryolite. Which statement is incorrect?
May/June 2016
A bicycle manufacturer wants to select an appropriate substance for bicycle frames. The table gives the properties of several materials that might be used.
May/June 2016
This question concerns metals.
May/June 2016
Zinc is obtained from zinc blende, an ore made up mainly of zinc sulfide, ZnS.
May/June 2016
The diagram portrays a blast furnace. Its labels show waste gases, the raw materials coke, C; iron ore, Fe$_2$O$_3$; limestone, CaCO$_3$; together with an inlet X and an outlet Y.
May/June 2016
Which statement regarding iron extraction in a blast furnace is not correct?
May/June 2017
Steel is made from the iron obtained in a blast furnace. Which statement about the production of iron and steel is incorrect?
May/June 2017
Which statement concerning the extraction of iron from hematite is correct?
May/June 2017
Zinc metal is obtained from its ore zinc blende by a method similar to the one used for extracting iron from hematite. In what way is the extraction of zinc different from the extraction of iron?
May/June 2017
What process is used to extract zinc from zinc blende?
May/June 2017
Which equation in the zinc extraction process shows zinc being formed by reduction?
May/June 2017
Both aluminium and zinc are metals.
May/June 2017
Iron is obtained from its ore by heating that ore with carbon in a blast furnace.
May/June 2017
Zinc is an extremely important metal.
May/June 2017
Inside a blast furnace, iron ore is combined with coke and limestone, then heated in a stream of hot air. Compound R is produced. Compound R then reduces the iron ore to iron. Which equation shows how compound R is formed?
May/June 2018
In a blast furnace, iron is made from iron ore. Which equation shows the main reaction occurring in zone 1?
May/June 2018
Limestone is used in many industrial processes. For which process is it not used?
May/June 2018
Which of the following statements about metal extraction is correct?
May/June 2018
Which statement about extracting zinc on an industrial scale is correct?
May/June 2018
Limestone is involved in many industrial processes. For which process is it not used?
May/June 2018
Which equation shows the first stage in extracting zinc from zinc blende?
May/June 2018
This question concerns iron.
May/June 2018
Describe, in terms of protons, neutrons and electrons, the ways in which the isotopes $^{29}_{13}$Al and $^{27}_{13}$Al are alike and how they differ.
May/June 2018
Iron is obtained from its ore in a blast furnace. Hematite, coke, limestone and hot air are introduced into the furnace. Which explanation is incorrect?
May/June 2019
Iron is obtained from its ore in a blast furnace. Hematite, coke, limestone and hot air are fed into the furnace. Which explanation is incorrect?
May/June 2019
Iron is obtained from its ore in a blast furnace. Hematite, coke, limestone and hot air are put into the furnace. Which explanation is incorrect?
May/June 2019
This question concerns iron and compounds of iron.
May/June 2019
The table gives the percentage by mass for the elements found in the Earth’s crust and in the oceans.
May/June 2019
This question concerns iron and iron compounds.
May/June 2019
Zinc and copper sit next to one another in the Periodic Table.
May/June 2019
Iron from a blast furnace is processed with oxygen and calcium oxide to produce steel. Which substances present in the iron are removed?
May/June 2021
Iron from a blast furnace is converted into steel by being treated with oxygen and calcium oxide. Which substances are removed from the iron?
May/June 2021
Iron is obtained from hematite, whereas aluminium is obtained from bauxite. Which of the following statements about the extraction processes are correct?
May/June 2021
Iron from a blast furnace is reacted with oxygen and calcium oxide to produce steel. Which substances are taken out of the iron?
May/June 2021
Which reaction does not take place during the extraction of iron from hematite in a blast furnace?
May/June 2021
What substances are employed in the extraction of aluminium?
May/June 2021
Which compounds are given off during the extraction of zinc from zinc blende and during respiration?
May/June 2021
Which reaction does not take place during the extraction of iron from hematite in a blast furnace?
May/June 2021
This question concerns iron.
May/June 2021
This question concerns metals.
May/June 2021
Which of the following statements about the reactions taking place in the blast furnace is correct?
May/June 2022
Iron is obtained from hematite in the blast furnace at a temperature of around $1550\,^{\circ}\text{C}$. Which equation represents the main reaction responsible for raising the temperature inside the furnace?
May/June 2022
During the extraction of aluminium using electrolysis, cryolite is introduced to the bauxite ore. Which row states the function of cryolite and shows the ionic half-equation at the cathode?
May/June 2022
The processes involved in extracting zinc are listed. In what sequence are these processes carried out?
May/June 2022
Which substance is employed to reduce zinc oxide during the manufacture of zinc?
May/June 2022
This question concerns aluminium.
May/June 2022
This question concerns zinc and its compounds.
May/June 2022
A portion of the reactivity series of metals is shown. metal P carbon metal Q metal R (decreasing reactivity) Which row indicates the method used to extract each metal from its ore?
May/June 2023
Which reaction inside the blast furnace gives out heat energy?
May/June 2023
Which of the following statements about extracting iron in a blast furnace are correct?
May/June 2023
Why is cryolite included in the extraction of aluminium by electrolysis?
May/June 2023
Which of the following statements about extracting iron in a blast furnace are correct?
May/June 2023
This question concerns metals.
May/June 2023
Which equation shows the reduction of a compound present in hematite in the blast furnace?
May/June 2024
This question concerns metals.
May/June 2024
Name the principal iron ore charged into the blast furnace.
May/June 2024
What process is used when extracting iron from hematite?
May/June 2025
Which equation shows a reaction taking place in a blast furnace during the extraction of iron from hematite?
May/June 2025
In the Periodic Table, chromium is the element with atomic number 24.
May/June 2025
Impure iron obtained from the blast furnace is changed into steel as illustrated. Which statement about the process is correct?
Oct/Nov 2016
The impurities found in iron produced by the blast furnace include carbon, phosphorus and silicon. Which of these impurities are removed from the molten iron as gases during its conversion into steel?
Oct/Nov 2016
Iron is converted into steel using basic oxides and oxygen. Which statement is incorrect?
Oct/Nov 2016
The impure iron produced by the blast furnace is changed into steel, as shown. Which statement about this process is correct?
Oct/Nov 2016
Aluminium is obtained using electrolysis. From which ore is aluminium obtained, and at which electrode does aluminium get deposited during electrolysis?
Oct/Nov 2016
Zinc oxide may be reacted with carbon to form zinc metal. Which of the following equations correctly represents this reaction?
Oct/Nov 2016
Impurities present in iron produced in the blast furnace include carbon, phosphorus and silicon. Which of these impurities are driven off from the molten iron as gases when it is converted into steel?
Oct/Nov 2016
Which assertion about the industrial extraction of aluminium from aluminium oxide is correct?
Oct/Nov 2016
Basic oxides and oxygen are used to change iron into steel. Which statement is incorrect?
Oct/Nov 2016
Iron is classified as a metal.
Oct/Nov 2016
Aluminium is a highly significant metal. It is obtained from bauxite ore by electrolysis. Bauxite is an impure form of aluminium oxide, Al$_2$O$_3$.
Oct/Nov 2016
Which material is not used in the large-scale extraction of iron from iron ore?
Oct/Nov 2017
What process is used to obtain iron from hematite in the blast furnace?
Oct/Nov 2017