Question

What is the reaction of calcium oxide with water?

Answer 1

Hint: Chemical reactions are those reactions in which reactants get converted into products under some conditions like at fixed temperature and pressure and some reactions proceed with the help of a catalyst which increases their rate of reaction.

Complete answer:
Chemical reactions when proceed then some amount of energy is released or in some reactions some energy is absorbed on this basis the reactions are divided into two categories called as exothermic reactions and endothermic reactions.
Calcium oxide is represented by the chemical formula $CaO$ is commonly known by the name quick lime which is generally used as a chemical compound and calcium oxide is white in color, alkaline in nature and exists as crystalline solid at room temperature.
Water is composed by 2 hydrogen atoms and 1 oxygen atom represented by the chemical formula $H_{2}O$. This is termed as the lifeline for living organisms and the main source of water is rain, lakes, ponds etc.
When calcium oxide is react with water then calcium hydroxide is produced and the reaction can be shown as:
$Ca+H_{2}O\to Ca{(OH)}_2$
Hence the product formed is calcium hydroxide also known by the name slaked lime. The reaction shown above is kept in the category of combination reaction as calcium and water got combined during this reaction.

Note:
Calcium hydroxide is an inorganic compound which is present as a colorless crystal or white powdered form. There are many applications of calcium hydroxide like it is used to prepare lime mortar and also in water and sewage treatment.