Poly(propene) is a polymer widely used to make packaging, containers, and pipes.
Poly(propene) has a melting point of 160∘C160^\circ\text{C}160∘C.
A brass alloy used in plumbing fixtures has a melting point of 960∘C960^\circ\text{C}960∘C.
Calculate the ratio of the melting point of poly(propene) to the melting point of the brass alloy. Express the ratio in its simplest integer form, 1:n1 : n1:n.
In the past, water pipes were made of metals such as lead or iron. Suggest two reasons why polymers like poly(propene) are a better choice than these metals for modern household water pipes.
48 exam-style questions on OCR GCSE Chemistry Properties of materials. Each one has a worked solution and a mark scheme showing where the marks go.