Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Unit
Inorganic Chemistry
869 practice questions
Topics covered
- The Alkali Metals85 practice questions
- The Halogens86 practice questions
- Gases in the Atmosphere86 practice questions
- Reactivity Series163 practice questions
- Extraction and Uses of Metals128 practice questions
- Acids, Alkalis and Titrations83 practice questions
- Acids, Bases and Salt Preparations156 practice questions
- Chemical Tests68 practice questions
Practice questions
221–230 of 374 · Normal
Question 221
2 marks · Normal
Answer and see the solution →State one advantage and one disadvantage of using high-carbon steel instead of mild steel for making nails.
Question 222
4 marks · Normal
Answer and see the solution →Two companies plan to produce saucepans and garden spades. They are choosing between mild steel, high-carbon steel, and stainless steel.
(a)[1 mark]Explain, with one property, why stainless steel is preferred over mild steel for saucepans.
(b)[1 mark]State a key property of high-carbon steel that makes it better than mild steel for the blade of a garden spade.
(c)[1 mark]Suggest a disadvantage of using stainless steel for the entire production in both cases.
(d)[1 mark]Compare one advantage and one disadvantage of mild steel compared to high-carbon steel in practical use.
Question 223
3 marks · Normal
Answer and see the solution →Explain, in terms of properties, why a railway company would choose to use high-carbon steel for making the rails but mild steel for the carriage bodies.
Question 224
4 marks · Normal
Answer and see the solution →Properties of three different steels Type of Steel Composition Main Property Typical Use Mild steel Up to 0.25% carbon Malleable Car bodies High-carbon steel 0.6–1.2% carbon Hard Cutting tools Stainless steel Chromium and nickel Corrosion resistant Kitchen sinks (a)[1 mark]From the table, state which steel would be most suitable for making food-processing equipment. Give a reason for your choice.
(b)[1 mark]Suggest which steel is likely to be easiest to shape into different forms during manufacture. State the property from the table that supports your answer.
(c)[1 mark]Explain, using the data, why high-carbon steel is chosen for cutting tools.
(d)[1 mark]Name a disadvantage of using mild steel where water is present.
Question 225
1 mark · Normal
Answer and check →Which of these is the typical composition of mild steel?
- A.Iron with up to 0.25% carbon
- B.Iron with 2% carbon
- C.Iron with chromium and nickel
- D.Iron with 1% carbon and manganese
Question 226
2 marks · Normal
Answer and see the solution →State one typical use of high-carbon steel. Give a reason for this use based on its properties.
Question 227
3 marks · Normal
Answer and see the solution →A factory has a block of pure iron with a mass of 2000 kg. The factory wants to make mild steel by adding carbon to the iron so that the final carbon content is exactly 0.20% by mass.
Calculate:
(a)[3 marks]The mass of carbon, in kg, that must be added to the iron to make 2000 kg of mild steel containing 0.20% carbon by mass.
Question 228
6 marks · Normal
Answer and see the solution →Metals such as aluminium and sodium are found above carbon in the reactivity series. Aluminium is a widely used metal in the modern world.
(a)[2 marks]Explain why aluminium cannot be extracted from its ore by heating it with carbon.
(b)[2 marks]State and explain one property of aluminium that makes it suitable for use in overhead electricity cables.
(c)[2 marks]Copper is also used in electricity cables. Compare one property of copper with aluminium that affects its use in cables.
Question 229
6 marks · Normal
Answer and see the solution →Aluminium is a metal that is extracted from its ore using electrolysis. Aluminium alloys are used for many applications due to their improved properties compared to pure aluminium.
(a)[2 marks]Explain why aluminium is extracted by electrolysis and not by reduction with carbon.
(b)Aluminium objects are usually made from alloys instead of pure aluminium.
(i)[1 mark]Define the term 'alloy'.
(ii)[3 marks]Explain, using ideas about the arrangement of atoms, why alloys are harder than pure metals. You may use a labelled diagram or clear description in your answer.
Question 230
6 marks · Normal
Answer and see the solution →Metals above carbon in the reactivity series cannot be extracted by carbon reduction. Some, like titanium, are extracted using a more reactive metal, such as magnesium.
(a)[2 marks]Explain, in terms of reactivity, why magnesium can be used to extract titanium from its oxide, but carbon cannot.
(b)Steel is an alloy made from iron and carbon.
(i)[1 mark]Define the term alloy.
(ii)[3 marks]Describe why alloys such as steel are usually harder than pure iron. You may draw a labelled diagram to support your answer.