Correct option is C
When calcium oxide (CaO) reacts with water (H2O), calcium hydroxide (Ca(OH)2 is formed, releasing a significant amount of heat. The reaction is:
CaO + H2O→Ca(OH)2+Heat
This is a
combination reaction because two reactants combine to form a single product, and it is also an
exothermic reaction because heat is released during the process.
Important Points:
· Calcium oxide is commonly known as quicklime.
· Calcium hydroxide is known as slaked lime.
· This reaction is highly exothermic and can even cause burns.
· It is used in construction to prepare lime mortar.
· The heat generated in the reaction is why it’s classified as exothermic.
· Combination reactions involve the combination of two or more reactants into a single product.
