Answer the following questions: (a) For a reaction between gas A and liquid B we need to use a solid catalyst with a high catalyst/liquid B ratio and ensure a good contact between gas A and the catalyst. Discuss and justify the best reactor type and flow pattern for this reaction. (5 marks) (b) Diastase is a biological enzyme used as a catalyst to convert starch (compound A) into maltose (Product P) in a diluted aqueous solution (constant density). The concentration of starch and the reaction rate are shown in Table Q4. TABLE Q4 CA (mol L-1) 20 16 12 8 4 TA (mol L-1 s-1) 80 40 16 8 4 22 A reactor is used to convert 80% of starch from an industrial stream with a flow rate of 4 L s-1. The concentration of starch at the inlet, CAO, is 20 mol L-1. Compare, justify, AND calculate the volume of the best continuous mode reactor (stirred tank or tubular) to use in his factory. (12 marks) (c) For the reaction A P→ Q, select and justify, in each case, the preferred option to favour the formation of P. (i) Option 1 Option 2 (ii) Option 1 Option 2 * (8 marks)