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For the non-catalytic reaction of particles with surrounding fluid, the time needed to achieve the same fractional conversion for particles of different but unchanging sizes is proportional to the square of particle diameter, when the __________ is the controlling resistance. | |
A. | film diffusion [Wrong Answer] |
B. | diffusion through ash layer [Correct Answer] |
C. | chemical reaction [Wrong Answer] |
D. | either (a), (b) or (c) [Wrong Answer] |