Calcium carbonate decomposes to give
ACaO + H₂O
BCaO + CO₂CORRECT
CCa + O₂ + CO₂
DCaCl₂ + CO₂
WAECChemistry
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Why the answer is B, and why the others tempt you.
CaCO₃ → CaO + CO₂ (thermal decomposition of limestone).
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