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

Why does adding a small amount of carbon to iron (to make steel) increase the hardness of the metal?

Which of these best explains why some alloys have higher melting points than the pure metal components?

Stainless steel is more resistant to corrosion than ordinary steel because it contains chromium. What is the role of the chromium?

Brass is often used for door handles because it does not rust and looks attractive. Which property of copper-zinc alloys explains why they do not form the red-brown rust seen on iron?

Which of these statements about bronze and brass is correct?

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?

A manufacturer wants to reduce cost while keeping electrical conductivity high for power transmission lines. Which material is commonly used as a compromise because it is lighter and cheaper than copper but still conducts well?

Which alloy would you choose if you need a lightweight, strong material for bicycle frames and aircraft structures?

Which of these is an example of a substitutional alloy?

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?

Which statement explains why intermetallic compounds formed in some alloys can make them brittle?