(a(i))[1]
Give one observation you would make during this reaction.
(a(ii))[1]
Explain why this reaction is classed as a redox reaction.
(a(iii))[2]
Identify the oxidising agent in this reaction. Give one reason for your answer.
(a(iv))[2]
Write a chemical equation for magnesium reacting with iron(III) oxide.
(b(i))[1]
How does painting iron and steel stop rusting?
(b(ii))[2]
Explain how the magnesium blocks stop the whole bottom of the boat from rusting.
(b(iii))[1]
Explain why copper blocks fail to prevent rusting.