Question

what is addition reaction substitution reaction and homologus
reaction​

Answer 1

unsaturated hydrocarbons add hydrogen in the presence of catalyst such as palladium and nickel to give saturated hydrocarbons called as addition reaction

saturated hydrocarbons are fairly unreactive and are inert in the presence of most reagents called as substitution reaction

any chemical reaction that convert reactant into next member of homologous series .
homologous series is a group of compounds differ by CH2 unit.


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Answer 2

Explanation:

the reaction in which region substitute for the places and atom or a group of atoms from the east and substrate are called substitution reaction