An iron nail was placed in boiling tube C, which contained boiled distilled water covered with a layer of cooking oil. After one week, the iron nail did not rust.
Explain why the nail did not rust in these conditions.
97 exam-style questions on Edexcel GCSE Chemistry 6.1 Transition metals, alloys and corrosion, covering 6.1.1 Properties of transition metals, 6.1.2 Corrosion and its prevention, and 6.1.3 Alloys and the uses of metals. Each one has a worked solution and a mark scheme showing where the marks go.