State the relationship between oxidation and oxidising agent in a redox reaction. Give an example of redox reaction showing the relationship between oxidation and oxidising agent. (2 marks)

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Solution

$∙$ Oxidation is the addition of oxygen or removal of hydrogen from a reactant. (0.5 marks)

$∙$ An oxidising agent causes oxidation of the other reactant by itself getting reduced. (0.5 marks)

$∙$ For example: Copper oxide reacts with hydrogen to form copper and water. In this reaction, copper oxide is getting reduced to copper, so it is an oxidising agent. It oxidises hydrogen to water. (1 mark)

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