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
481–490 of 869
Question 481
1 mark · Easy
Answer and see the solution →Define the term 'alloy.'
Question 482
3 marks · Easy
Answer and see the solution →Answer the following about metals:
(a)[2 marks]Name two physical properties of copper.
(b)[1 mark]State one use of iron or steel.
Question 483
2 marks · Easy
Answer and see the solution →A pan is made using aluminium because of its low density. The pan has a mass of 540 g and a volume of 200 cm³. Calculate the density of aluminium in g/cm³.
Question 484
2 marks · Easy
Answer and see the solution →A pure metal rod can be bent easily because its layers of atoms can slide. In an alloy rod, a force of 200 N is needed to cause bending, but in the pure metal it requires only 120 N. Calculate how many times harder the alloy rod is to bend compared to the pure metal (give your answer to 1 decimal place).
Question 485
2 marks · Normal
Answer and see the solution →State two reasons why aluminium is widely used for making aircraft bodies.
Question 486
4 marks · Normal
Answer and see the solution →The diagrams below show simplified structures of a pure metal and an alloy. Study them and answer the questions.
(a)[1 mark]Define the term 'alloy.'
(b)[3 marks]Explain why alloys are usually harder than pure metals. You may use diagrams in your answer.
Question 487
3 marks · Normal
Answer and see the solution →Brass is an alloy of copper and zinc, and is often used for making musical instruments.
Explain, in terms of its structure, why brass is harder than pure copper. Your answer should refer to the arrangement of atoms.
Question 488
4 marks · Normal
Answer and see the solution →The table shows the melting point and main use of some metals.
Properties and uses of metals Metal Melting point (°C) Main use Aluminium 660 Overhead electricity cables Copper 1085 Electrical wiring Iron 1538 Building structures (a)[2 marks]Which metal from the table is most suitable for overhead power cables? Give one reason for your choice.
(b)[2 marks]Explain why copper is commonly used for making electrical wiring.
Question 489
1 mark · Normal
Answer and check →Why are alloys harder than pure metals?
- A.Alloys contain atoms of different sizes, which disrupt the layers.
- B.Alloys have fewer atoms.
- C.Alloys are always magnetic.
- D.Alloys have higher melting points.
Question 490
2 marks · Normal
Answer and see the solution →Give two reasons why copper is used for making electrical wiring.