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Surface Chemistry

Question
CBSEENCH12006431

What are homogeneous and heterogeneous catalysts?

Solution
Answer:
When the reactants and the catalyst are in the same phase (i.e., liquid or gas), the process is said to be homogeneous catalysis.

2SO2(g) + O2(g)     NO(g)  2SO3(g)

The catalytic process in which the reactants and the catalyst are in different phases is known as heterogeneous.

2SO2(g)      Pt(s)  2SO3(g)