Question

what is addition reaction and substitution reaction

Answer 1

We will study three main types of reactions - addition, elimination and substitution. An addition reaction occurs when two or more reactantscombine to form a single product. This product will contain all the atoms that were present in the reactants. Addition reactions occur with unsaturated compounds.

Answer 2

In addition reaction just an atom or group is added to a compound
In substitution reaction one atom or molecule isbreplaced by another atom or group