Chemistryhard · Past Paper
What happens when calcium carbonate is heated to about 900 °C?
AIt melts
BIt sublimes
CIt decomposes into CaO and CO2
DIt reacts with nitrogen
✓ Correct Answer: C — It decomposes into CaO and CO2
Thermal decomposition of limestone (calcium carbonate) is used industrially to produce quicklime and CO2.
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