Which types of reactions are represented by the chemical equation $CaO (s) + {CO}_{2} (g) \to {CaCO}_{3} (s)$ .

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Solution

Type of reactions:
Combination reaction - Two or more compounds combine to form one compound.
Decomposition reaction - A complex molecule breaks down to make simpler ones.
Precipitation reaction - Two solutions of soluble salts are mixed resulting in an insoluble solid (precipitate) forming.
Neutralization reaction - An acid and a base react with each other and the product of this reaction is salt and water.
Combustion reaction - Oxygen combines with a compound to form carbon dioxide and water.
Displacement reaction - One element takes place of another element in the compound.
Chemical reactions:
$CaO (s) + {CO}_{2} (g) \to {CaCO}_{3} (s)$
This type of reaction is a combination reaction as two reactants combine to form one product.
Therefore, the above chemical reaction is a combination reaction.

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