Question

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(ii) In homogeneous catalysis, the reaction mixture and catalyst are either
(a) in liquid and solid state
(b) in solid and gaseous state
(c) in liquid and gasuous state (d) in liquid, gaseous or solid state​

Answer 1

In a homogeneous reaction, the catalyst is in the same phase as the reactants. What is a phase? If you look at a mixture and can see a boundary between two of the components, those substances are in different phases. A mixture containing a solid and a liquid consists of two phases.