 
			 
			MCQOPTIONS
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				| 1. | In a tall reactor, oxygen transfer rates will be | 
| A. | highest at the surface of the reactor | 
| B. | highest at the base of the reactor | 
| C. | highest in the middle of the reactor | 
| D. | the same throughout the reactor | 
| Answer» C. highest in the middle of the reactor | |