🔩 Alloys: Definitions, Compositions & Uses
15 exam-style questions · 29 total marks · Reveal answers when ready
📖 Section A — Definitions
5 questions · Core concepts and structural explanation
Define the term alloy.
Is an alloy a compound or a mixture? Justify your answer.
Explain, in terms of structure, why pure metals are malleable but alloys are generally harder and stronger.
State one reason why alloys are often more useful than pure metals.
Describe how the structure of an alloy differs from that of a pure metal. Use a diagram or description.
⚗️ Section B — Compositions
5 questions · Alloy components and identification
Name the two metals present in brass.
Name the two metals present in bronze.
Name three elements mixed with iron to make stainless steel.
What is the main metal component of both stainless steel and mild steel?
Complete the table: Name the alloy formed from the following compositions. (a) Iron + Carbon (small amount) (b) Copper + Zinc
🏗️ Section C — Uses & Evaluation
5 questions · Properties, applications, and evaluation
Why is stainless steel used to make cutlery and surgical instruments? Give two reasons.
Brass is used to make musical instruments such as trumpets. Suggest why brass is more suitable than pure copper for this purpose.
Explain why bronze is used to make statues and medals rather than pure tin or pure copper.
Steel is used in construction (bridges, buildings). State two properties that make steel suitable for this use.
A manufacturer needs to choose a material for making kitchen sinks. They are choosing between pure iron, mild steel, and stainless steel. Evaluate the suitability of each material. Recommend the best choice.
📊 Alloys — Quick Reference Card
⚠️ Examiner Trap: Brass = Cu + Zn. Bronze = Cu + Sn. These are swapped by students in nearly every exam sitting.
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