Which of the following is an example of homogeneous catalysis ?

Options

A. Oxidation of `NH_(3)` in Ostwald's process
B. Oxidation of `SO_(2)` in contact process
C. Oxidation of `SO_(2)` in lead chamber process
D. Manufacture of `NH_(3)` by Haber's process

Answer

C

Explanation

(c) : Homogeneous catalysis is the one in which reactant and catalyst form the single phase. In oxidation of `SO_(2)`, gaseous `NO_(2)` is used as catalyst, both form the same phase during the reaction.