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Question
The conversion of CaCO3 into CaO is an example of ____________ reaction.
Options:
A .  decomposition
B .  combination
C .  double displacement
D .  displacement
Answer: Option A
:
A
The conversion of calcium carbonate(CaCO)3 to calcium oxide(CaO) is an example of decomposition reaction. During the reaction, calcium carbonate decomposes on heating to form calcium oxide and carbon dioxide. The reaction takes place as follows:
CaCO3(s)HeatCaO (s)+CO2(g)

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