Name two groups in which the phenomenon of catalysis can be divided. Give one example of each group with chemical equation.

Explanation

The groups are hetergeneous catalysis and homogeneous catalysis. For example,
`N_(2)(g)+3H_(2)(g)overset(Pt(s))hArr2NH_(3)(g)`[Hetergeneous catalysis]
`2SO_(2)(g)+O_(2)(g)overset(2NO(g))to2SO_(3)(g)` [Homogeneous catalysis]