A Level Chemistry OCR Practice Exam 2026 – All-in-One Guide to Master Your Chemistry Exam!

Question: 1 / 400

What occurs in a redox reaction?

Only oxidation takes place

Only reduction takes place

Both reduction and oxidation take place

In a redox reaction, both oxidation and reduction processes occur simultaneously. Oxidation refers to the loss of electrons or an increase in oxidation state, while reduction involves the gain of electrons or a decrease in oxidation state. This intrinsic connection between the two processes is why redox reactions are characterized by the transfer of electrons from one species to another. The electron donor undergoes oxidation, and the electron acceptor undergoes reduction. Therefore, the presence of both processes is essential for the overall reaction to occur, making the correct answer reflect this dual nature of redox reactions.

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There is no change in oxidation state

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