What is catalysis ? How is catalysis classified ? Give two examples for each type of catalysis.

Explanation

Substances which accelerate the rate of a slow chemical reaction but - those chemical nature and mass remain unchanged after. the eaction are known as catalysts and the phenomenon is knova as catalysis. Cataxsis is mainly two types.
Homogeneous catalysis: When the reactants and the catalyst are in the same phase i.e., either liquid or gas the process is said to be homogeneous catalysis
e.g., (i) `2SO_(2)(g)+O_(2)(g) overset(NO(g)) to 2SO_(3)(g)`
Reactants `SO_(2) and O_(2)` and the catalyst NO are all gases and in the same.phase
(ii) `CH_(3)COOCH_(3)(l)+H_(2)(l) overset(HCl (l)) to CH_(3)COOH(aq)+C_(2)H_(5)OH(aq)`
The reactants and catalysts are in the same liquid phase
2 Heterogeneous catalysis: The catalytic process in which the reactants and the catalyst are in different phases is known as heterogeneous catalysis.
(I) `2SO_(2)(g)+O_(2)(g) overset(Pt(s)) to 2SO_(3)(g)`
The reaçtants are in gaseous state while that catalyst is solid.
(ii) `N_(2)+3H_(2) overset(Fe(s)) hArr 2NH_(3)(g)`
Reactants are gases, catalyst is solid.