PLEASE ANSWER ALL! Choose the right one. Explain in one sentence.

1. For gas-liquid-solid reactors, small catalyst particles are used in packed bed. A. True B. False

2. In three-phase reactions, if the main resistance lies in the G/L film, we should A: Use a contactor with large interfacial surface area B: Use a large exterior surface of solid C: Use large particles

3. In three-phase reactions, if the main resistance lies at the L/S boundary, we should A: Use a contactor with large interfacial surface area B: Use a large exterior surface of solid C: Use large particles

4. In three-phase reactions, if the resistance to pore diffusion intrudes, we should A: Use a contactor with large interfacial surface area B: Use a large exterior surface of solid C: Use small catalyst particles

5. In three-phase reactions, if the reaction controls and it has negative order kinetics, we should use plug flow conditions. A. True B. False

6. In bubble columns: homogeneous bubble flow forms at _____ gas velocities. A:low B: high

7. In bubble columns: slug flow forms in a ____ column. A: narrow B: wide

8. In bubble columns: heterogeneous flow forms in a ____ column. A: narrow B: wide

9. In trickle bed reactors: trickle flow forms at ____ gas and liquid flows. A: low B. high

10. In trickle bed reactors: pulsed flow forms at ____ flow rates. A: low B. high

11. In trickle bed reactors: spray flow forms at high ____ velocities. A: gas B. liquid

12. In packed bed reactors with upflow: bubble flow forms A: at low gas and high liquid flow rates B: at higher gas and low liquid velocities C: at higher gas and high liquid flow rates

13. In packed bed reactors with upflow: spray flow forms A: at low gas and high liquid flow rates B: at higher gas and low liquid velocities C: at higher gas and high liquid flow rates

14. In packed bed reactors with upflow: slug flow forms A: at low gas and high liquid flow rates B: at higher gas and low liquid velocities C: at higher gas and high liquid flow rates

15. Channelling can easily occur in the liquid during trickle flow. A. True B False.