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Limestone is a common form of calcium carbonate. When limestone is subjected to high heat, it becomes calcium oxide and releases carbon dioxide gas. This change in limestone at a given temperature is an example of ___________.

A) Sublimation
B) Oxidation
C) Decomposition
D) Precipitation

Answer :

Final answer:

The change in limestone when subjected to high heat, resulting in calcium oxide and carbon dioxide gas, is an example of decomposition, a type of chemical reaction.

Explanation:

The change in limestone (calcium carbonate, CaCO3) when subjected to high heat resulting in calcium oxide (CaO) and carbon dioxide gas (CO2) is an example of decomposition.

During this process, a single compound breaks down into two or more simpler substances when heated, which is a classic chemical reaction often seen with carbonates such as limestone.

The reaction can be represented by the following equation: CaCO3 → CaO + CO2. This is a fundamental chemical process extensively used in various industries, like the production of quicklime, which has historically been important.

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