Question

differentiate between synthesis reaction and substitution reaction

Answer 1

in simple language
a) synthesis means making something new
e.g...process of photo synthesis in which food is synthesized.

b) when we substitute one component of reactant with another then it may be called as substitution reaction (replacing one component and placing another)
e.g. CH4+Cl2=CH3Cl +HCl

here H is substituted with Cl atom