Question detail
In a reaction where zinc oxide (ZnO) is converted to zinc (Zn) by heating with carbon, identify which substance is oxidised and which is reduced.
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
Reactivity of metals
Question
In a reaction where zinc oxide (ZnO) is converted to zinc (Zn) by heating with carbon, identify which substance is oxidised and which is reduced.
Answer
In this reaction, zinc oxide (ZnO) is reduced to zinc (Zn) as it loses oxygen, while carbon is oxidised as it gains oxygen from the zinc oxide. Therefore, ZnO is reduced and carbon is oxidised.
Explanation
This question assesses the ability to apply knowledge of oxidation and reduction in a specific chemical reaction. A strong answer correctly identifies the changes in oxidation states and the roles of the reactants, showing an understanding of redox processes.
Common mistake
Confusing Oxidation and Reduction
Students often confuse oxidation with loss of oxygen and reduction with gain of oxygen, leading to incorrect explanations of reactions.
Remember that oxidation is defined as gain of oxygen, while reduction is loss of oxygen. Use examples of metal reactions to illustrate these definitions.
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