Question

Define combination reaction give 1 example of combination reaction with is exothermic in nature

Answer 1

When two or more elements or compounds react to form a single compound are said to composition reaction


Exothermic means realease of energy

So, example of combination reaction which is exothermic in nature can be
CaO+H2O----------------->Ca(OH)2+Heat

Answer 2

A reaction in which two or more substances (reactants) combine to form a single product, is called combination reaction.

The reaction of calcium oxide and water is an exothermic combination reaction.

CaO (Quick lime)+H2O (Water) ----> Ca(OH)2(Slaked lime) + Heat