Question

what is substitution reaction

Answer 1

Hii friends
Substitution reaction (also known as single displacement reaction or single substitution reaction) is a chemical reaction during which one functional group in a chemical compound is replaced by another functional group.[1][2] Substitution reactions are of prime importance in organic chemistry.

Answer 2

in this reaction hydrogen is replaced by any halogen in the presence of sunlight. it occurs only in saturated hydrocarbons