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28 ) Which of the following is/are correct regarding mechanism of
transport and surface reaction?
A
As the velocity of fluid over the pellet increases, the external mass
transfer decreases due to less time of contact.
B
Internal diffusion and surface reaction are not at all affected by flow
condition external to the pellet,
C
Internal diffusion resistance decreases with decrease in pellet size.
D
External mass transfer increases with decrease in particle size.


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