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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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Below a typical questions that will be covered in this test. You final score will be logged on your account

Which of these is a disadvantage of using an alloy instead of a pure metal for recycling?
A metal alloy contains 88.2% copper and 11.8% tin by mass. What is the percent by mass of tin in 250 g of this alloy?
Why does adding a small amount of carbon to iron (to make steel) increase the hardness of the metal?
Solder is a low-melting alloy used to join electrical components. Which statement about solder is correct?
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?
Why is a steel tool that is heat-treated (quenched and tempered) often stronger than the original steel?
Which of these is an example of a substitutional alloy?
Why does adding zinc to copper to make brass change the colour compared with pure copper?
Stainless steel is more resistant to corrosion than ordinary steel because it contains chromium. What is the role of the chromium?
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?
Brass is an alloy of copper and zinc. Which property of brass makes it suitable for decorative fittings and musical instruments?