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Alloys As Useful Materials (chemistry Only) (GCSE Chemistry)

The following is a GCSE Chemistry test covering 'Alloys As Useful Materials (chemistry Only)' from the broader topic Using Resources. The test is geared towards the AQA exam board style syllabus.
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An alloy is a mixture of a metal with one or more other elements. Which statement best explains why alloys are often harder than the pure metal they include?
A metal alloy used for electrical contacts must have good conductivity and resistance to wear. Which approach is often used?
An alloy contains 92.5% iron and 7.5% carbon by mass. What mass of carbon is in 2.0 kg of this alloy?
Which statement explains why intermetallic compounds formed in some alloys can make them brittle?
Galvanizing is a method to protect iron or steel from rusting. What does galvanizing involve?
Why does adding zinc to copper to make brass change the colour compared with pure copper?
Which of the following explains why many electrical wires are NOT made from steel alloys even though steel is strong?
Which of the following is a key environmental benefit of recycling metal alloys rather than extracting new metal from ore?
Which alloy would you recommend for making a pot that must be non-reactive with food, corrosion-resistant and able to be polished to a bright finish?
An alloy is described as “interstitial” when:
Stainless steel is more resistant to corrosion than ordinary steel because it contains chromium. What is the role of the chromium?