Question

Addition reaction explain

Answer 1

An addition reaction, in organic chemistry, is in its simplest terms an organic reaction where two or more molecules combine to form a larger one (the adduct).[1][2]

Addition reactions are limited to chemical compounds that have multiple bonds, such as molecules with carbon–carbon double bonds (alkenes), or with triple bonds (alkynes). Molecules containing carbon—hetero double bonds like carbonyl (C=O) groups, or imine (C=N) groups, can undergo addition, as they too have double-bond character.

An addition reaction is the reverse of an elimination reaction. For instance, the hydration of an alkene to an alcohol is reversed by dehydration.

There are two main types of polar addition reactions: electrophilic addition and nucleophilic addition. Two non-polar addition reactions exist as well, called free-radical addition and cycloadditions. Addition reactions are also encountered in polymerizations and called addition polymerization.

Answer 2

it is the process in which the unsaturated (which have double or triple bond) carbon compounds,add up hydrogen atoms to them in order to become saturated(having single bond) .this is done with the help of catalysts such as nickel that adds up hydrogen without disturbing the process.
 for example,hydrogenation process which is used in industries.

hope it helps!!!!