1) What is a Redox Reaction?
o A redox (reduction-oxidation) reaction involves the transfer of electrons, where one substance is oxidized (loses electrons) and another is reduced (gains electrons).
2) Analysis of the Options:
o Dihydrogen monoxide (water): 2H2O→2H2+O2 (Redox reaction as hydrogen is reduced and oxygen is oxidized).
o Sodium hydride: 2NaH→2Na+H2 (Redox reaction as sodium is oxidized and hydrogen is reduced).
o Potassium chlorate: 2KClO3→2KCl+3O2 (Redox reaction as oxygen is reduced and potassium is oxidized).
o Calcium carbonate: CaCO3→CaO+CO2 (NOT a redox reaction, as no electrons are transferred).
Thus, the correct answer is Decomposition of calcium carbonate.
Study Notes
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