Question

write decomposition reaction of limestone?

Answer 1

Limestone is mainly calcium carbonate, CaCO3. When it is heated, it breaks down to form calcium oxide and carbon dioxide. Calcium oxide reacts with water to produce calcium hydroxide. Limestone and its products have many uses, including being used to make mortar, cement, concrete and glass.

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Answer 2

Limestone is calcium carbonate (CaCO3) which when heated to above 840°C decomposes into calcium oxide (CaO) while releasing carbon dioxide (CO2) according to the equation:
CaCO3(s) → CaO(s) + CO2(g). it is a decomposition reaction.