One question per day; those who answer correctly receive 6 wealth points, while participants receive 2 wealth points； August 28th
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Multiple-choice question: In the production of vinyl chloride via the calcium carbide method, the gas-phase addition reaction between acetylene and hydrogen chloride in the presence of mercuric catalyst is actually heterogeneous and takes place in five steps, among which it is the control stage. A. External diffusion B. Internal diffusion C. Surface reaction D. None Answer: C, Surface reaction
Both internal and external diffusion involve surface reactions and are elementary reactions. You can only choose between A and B.
In the synthesis of vinyl chloride via the calcium carbide method, the gas-phase addition reaction between acetylene and hydrogen chloride in the presence of mercuric catalyst is actually heterogeneous and takes place in five steps, among which stage C is the control stage. A. External diffusion B. Internal diffusion C. Surface reaction D. None