Q3. The following batch data are available for a liquid phase reaction AR : (a) How long will it take for the concentration to decrease from 1.2 to 0.2 moles /L ? (b) The same reaction is to be carried out in a plug flow reactor of unknown volume followed by a mixed flow reactor of 25L volume connected in series. The specification of the feed stream is as follows: Total flowrate =750Lh, concentration of A in the feed =1.0moles/L. If 80% conversion of A is required from the above PFR-MFR combination, what size of plug flow reactor would be needed? [12]