Question

1. Define combination reaction. Give one example of combination reaction which is exothermic in nature.

Answer 1

A reaction in which two or more than two elements or compound combine together to form a single compound is called a combination reaction

C(s). + O2(g). -. CO2(g)
this reaction is an exothermic reaction

Answer 2

Answer:

Combination Reaction :-

A reaction in which two or more substances combine together to form a new substances, is called a combination reaction.  The following reactions are combination reaction :-

Sulphur dioxide and oxygen combine to form sulphur trioxide.

                SO₂(g) + O₂(g)  ==>  SO₃(g)