AP Chemistrymediummcq1 pt
Heating potassium chlorate yields potassium chloride and oxygen gas: 2KClO₃(s) → 2KCl(s) + 3O₂(g). How is this reaction classified?
A.Decomposition
B.Synthesis
C.Single replacement
D.Combustion
Explanation
Core Concept
A single substance breaks into two or more simpler products, the exact signature of decomposition. Heat dismantles the chlorate ion, liberating oxygen gas and leaving chloride behind. Spotting the one-reactant-to-many-products shape identifies decomposition instantly, whichever salt undergoes it.
Correct Answer
ADecomposition
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