If substance A loses oxygen and substance B gains that oxygen, which statement is correct?
Answer and explanation
Correct answer: A is reduced and B is oxidised
In the oxygen-based definition of redox, removal of oxygen from a substance is reduction, whereas addition of oxygen is oxidation. Since A loses oxygen, A is reduced. Since B gains that oxygen, B is oxidised. These processes occur together as a redox change. Option B reverses the definitions, and options C and D incorrectly assign the same process to both substances.
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What is the correct answer to this question?
A is reduced and B is oxidised
Why is this the correct answer?
In the oxygen-based definition of redox, removal of oxygen from a substance is reduction, whereas addition of oxygen is oxidation. Since A loses oxygen, A is reduced. Since B gains that oxygen, B is oxidised. These processes occur together as a redox change. Option B reverses the definitions, and options C and D incorrectly assign the same process to both substances.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Chemical Reactions and Equations.
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