Question detail
In a redox reaction, if substance A loses oxygen and substance B gains oxygen, 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 redox reaction, if substance A loses oxygen and substance B gains oxygen, which substance is oxidised and which is reduced?
Answer
Substance A is oxidised because it loses oxygen, while substance B is reduced because it gains oxygen.
Explanation
This answer correctly identifies the roles of the substances in the redox reaction based on the transfer of oxygen. The question assesses the student's ability to apply their knowledge of oxidation and reduction in the context of oxygen transfer.
Common mistake
Confusing Redox Explanations
Students often confuse oxygen-transfer redox explanations with electron-transfer redox explanations, thinking they are the same.
To fix this, remember that oxygen-transfer focuses on the gain or loss of oxygen in reactions, while electron-transfer emphasizes the movement of electrons between species.
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