2022 · Q114
Calcium oxide reacts with water to produce slaked lime. It is an example of
general-sciencechemistry
- Acombination reaction
- Bdecomposition reaction
- Coxidation reaction
- Daddition reaction
Explanation
CaO + H₂O → Ca(OH)₂: two reactants combine into a single product (slaked lime), which is the definition of a combination reaction. It is strongly exothermic — the heat released is why quicklime was historically used for heating. It is not decomposition (one reactant splitting) or oxidation.