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Which chemical equation represents a redox reaction?
TiCl4(s) + 2H2O(g) – TiO2(s) + 4HCl(g)
--
CaO(s) + SiO2(s) – CaSiO3)

Fe2O3(s) + 2Al(s) — Al2O3(s) + 2Fe()
+
CaCO3(s) — Cao(s) + CO2(g)

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Answer:

CaCO3 yields CaO + CO2

Exclamation

Since the Decomposition state of a redox involves a broken down compound, this equation proves that this is a DECOMPOSITION since it is being broken down.

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