Amongst the following chemical reactions, the one representing homogeneous catalysis is

Options

A. `N_(2)(g)+3H_(2)(g) overset(Fe)(rarr) 2NH_(3)(g)`
B. `2SO_(2)(g)+O_(2)(g) overset(2NO)(rarr) 2SO_(3)(g)+2NO(g)`
C. `CO(g)+3H_(2)(g) overset(Ni)(rarr) CH_(4)(g)+H_(2)O`
D. `2SO_(2)+O_(2)(g) overset(V_(2)O_(5))(rarr) 2SO_(3)(g)`

Answer

B

Explanation

`underset(g)(2SO_(2))+underset(g)(O_(2))overset(2NO(g))(rarr)underset(g)(2SO_(3))+2NO(g)`
reactants and catalyst present in same phase.