Different types of Enthalpies of reaction

What are the different types of chemical reaction ?

What are different types of combination reactions?

What are different types of chemical reactions ? Illustrate each type with a sutable example .

What is the basic difference between enthalpy of formation and enthalpy of reaction? Illustrate with suitable examples.

What is the basic difference between enthalpy of formation and enthalpy of a reaction? Illustrated with suitable examples.