Metals
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
Physical and chemical properties of metals
SubtopicPhysical and chemical properties of metals under Metals for Grade 11 IGCSE.
Preview questions (no answers)
- 1.
A piece of zinc is added to a test tube containing dilute hydrochloric acid. What are the products of this reaction?
A.Zinc chloride and water
B.Zinc oxide and hydrogen
C.Zinc chlorate and hydrogen
D.Zinc chloride and hydrogen
- 2.
Why are alloys, such as brass or steel, often harder than the pure metals from which they are made?
A.The atoms in an alloy are smaller than those in a pure metal.
B.Atoms of different sizes disrupt the regular arrangement of layers.
C.Alloys contain covalent bonds which are stronger than metallic bonds.
D.The delocalized electrons are trapped between different types of atoms.
- 3.
Most metals are malleable. What feature of their structure allows them to be hammered into different shapes without breaking?
A.The presence of strong ionic bonds between atoms.
B.The ability of the delocalized electrons to absorb energy.
C.The layers of positive ions can slide over each other.
D.The large gaps between the metal atoms in the lattice.
Download the worksheet for Metals - Physical and chemical properties of metals to practice offline. It includes additional chapter-level practice questions.
Preview questions (no answers)
- 1.
Mild steel is an alloy used extensively in the automotive industry. What is its main use?
A.Making car bodies
B.Manufacturing engine spark plugs
C.Creating electrical circuitry
D.Producing specialized cutting tools
- 2.
What is the primary reason for coating iron with zinc in the process known as galvanizing?
A.To increase the density of the iron
B.To prevent the iron from rusting
C.To make the iron more flexible
D.To allow the iron to conduct heat better
- 3.
Which metal is the most suitable choice for making electrical household wiring due to its high electrical conductivity and ductility?
A.Iron
B.Magnesium
C.Copper
D.Lead
Download the worksheet for Metals - Uses of metals to practice offline. It includes additional chapter-level practice questions.
Preview questions (no answers)
- 1.
Stainless steel is highly resistant to corrosion. Which element is added to iron and carbon to provide this property?
A.Chromium
B.Magnesium
C.Sulfur
D.Sodium
- 2.
Pure gold is often too soft for making jewelry. Why is it alloyed with other metals like silver or copper?
A.To increase its reactivity with oxygen.
B.To make the final product harder and more durable.
C.To lower the melting point for easier casting.
D.To ensure the jewelry can conduct electricity better.
- 3.
Brass is a commonly used alloy in musical instruments and door fittings. Which two elements are mixed to produce brass?
A.Iron and Carbon
B.Copper and Tin
C.Copper and Zinc
D.Lead and Tin
Download the worksheet for Metals - Alloys to practice offline. It includes additional chapter-level practice questions.
The Reactivity Series
SubtopicThe Reactivity Series under Metals for Grade 11 IGCSE.
Preview questions (no answers)
- 1.
Aluminum is more reactive than iron, yet it is often used for drink cans and window frames because it does not appear to corrode. What is the reason for this?
A.It is a transition metal
B.It is protected by a tough, unreactive layer of aluminum oxide
C.It is alloyed with carbon to make it unreactive
D.It is below hydrogen in the reactivity series
- 2.
Which metal reacts most vigorously with cold water?
A.Calcium
B.Sodium
C.Zinc
D.Lead
- 3.
A piece of magnesium ribbon is placed into a test tube containing blue copper(II) sulfate solution (). Which observation would be correct?
A.The solution stays blue and a gas is evolved
B.The blue color fades and a brown solid forms
C.No reaction occurs because magnesium is less reactive
D.A silver-colored precipitate of copper forms
Download the worksheet for Metals - The Reactivity Series to practice offline. It includes additional chapter-level practice questions.
Extraction of Iron (Blast Furnace)
SubtopicExtraction of Iron (Blast Furnace) under Metals for Grade 11 IGCSE.
Preview questions (no answers)
- 1.
From which part of the blast furnace are the waste gases, such as nitrogen and carbon dioxide, primarily released?
A.The bottom, through the tap hole.
B.The top of the furnace.
C.The middle section, through the tuyeres.
D.They are not released but recycled back into the iron ore.
- 2.
Why is limestone () added to the blast furnace during the extraction process?
A.To provide the carbon needed for the reduction of iron ore.
B.To react with and remove acidic impurities like silicon(IV) oxide.
C.To act as a catalyst to speed up the production of iron.
D.To lower the melting point of the iron ore mixture.
- 3.
Which substance acts as the main reducing agent in the blast furnace to convert iron(III) oxide into molten iron?
A.Carbon dioxide ()
B.Oxygen ()
C.Nitrogen ()
D.Carbon monoxide ()
Download the worksheet for Metals - Extraction of Iron (Blast Furnace) to practice offline. It includes additional chapter-level practice questions.
Extraction of Aluminum (Bauxite)
SubtopicExtraction of Aluminum (Bauxite) under Metals for Grade 11 IGCSE.
Preview questions (no answers)
- 1.
During the electrolysis of aluminum oxide, where is the molten aluminum metal collected?
A.At the surface of the electrolyte
B.At the positive carbon anodes
C.At the bottom of the cell at the negative cathode
D.Inside the porous lining of the tank
- 2.
What is the chemical name for the white powder obtained after purifying bauxite before it enters the electrolytic cell?
A.Aluminum carbonate
B.Aluminum sulfate
C.Alumina
D.Aluminum chloride
- 3.
In the extraction of aluminum, why is cryolite () added to the purified aluminum oxide ()?
A.To act as a catalyst for the redox reaction
B.To prevent the aluminum from re-oxidizing
C.To lower the melting point of the electrolyte and improve conductivity
D.To increase the density of the molten mixture so aluminum floats
Download the worksheet for Metals - Extraction of Aluminum (Bauxite) to practice offline. It includes additional chapter-level practice questions.