Which of the following does not apply to heterogeneous catalysts?

• A. Heterogeneous catalysts exist in the same phase as the reactants.
• B. Heterogeneous catalysts have a large surface area.
• C. Chemisorption is usually involved in heterogeneous catalysis.
• D. An example of heterogeneous catalysis is the Haber–Bosch process of ammonia synthesis.

Answer: (A)