Which of the following decomposition reactions is NOT a redox reaction?
2024
Which of the following decomposition reactions is NOT a redox reaction?
- A.
Decomposition of dihydrogen monoxide
- B.
Decomposition of sodium hydride
- C.
Decomposition of potassium chlorate
- D.
Decomposition of calcium carbonate
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Correct answer: D
A decomposition reaction is redox only if oxidation states change. In decomposition of calcium carbonate to calcium oxide and carbon dioxide, the oxidation states remain unchanged, so it is not a redox reaction.