Overall rate of reaction in a heterogeneous catalytic reaction depends upon the mass and energy transfer from the fluid to solid surface and its rate of reaction is usually ________________ the concentration of catalyst, if it does not entail a chain mechanism?
Correct answer: C. Proportional to
- A. Inversely proportional to
- B. Independent of
- C. Proportional to
- D. Proportional to the square of
Explanation
Without a chain mechanism, doubling the amount of catalyst doubles the available active surface and hence the overall rate, provided transfer conditions remain comparable. Therefore the rate is proportional to catalyst concentration.
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