Question

Is the solid catalyst in the carbon monoxide filter an example of a homogeneous or heterogeneous catalyst?

Answer 1

The categorization is based on the state of matter the reactants and the catalyst are in, homo- meaning same, and hetero- meaning different. Gases react on the solid metal catalyst, gas and solids are two different phases, and thus it's heterogenous.

Answer 2

Thanks Aaron. Very much appreciated.