EVERYDAY SCIENCE

Detailed explanation-1: -It is a combination reaction as carbon combines with oxygen to form carbon dioxide. It is a combustion reaction as carbon is burnt in the presence of oxygen.

Detailed explanation-2: -Exothermic reaction: The reaction which releases heat after a reaction is called an exothermic reaction. As we can see in the above reaction the heat released in a reaction that’s why the nature of reaction is exothermic.

Detailed explanation-3: -The decomposition of Ca(OH)2 to CaO is the dehydration process or energy storage step where water vapor is liberated from the hydroxide. The reaction is endothermic with a positive reaction enthalpy.

Detailed explanation-4: -This is a combination reaction.