11. Langmuir equation is based on theory of multi-layer adsorption saying that the maximum capacity of adsorption exists. A. True B. False 12. In electrodialysis process, if severe polarization occurs, the effluent of dilute chamber will be acidic. A. True B. False 13. UF and MF has two filtration modes: dead-end filtration and cross-flow filtration. Once the fouling layer becomes stable in cross-flow filtration, the flux will also stay stable in a rather long time. A. True B. False 14. CT is an index of disinfection ability. Under a certain condition, the disinfection ability is high if CT value is high. A. True B. False 15. A full process of ion exchange process in order is exchange-washing-regeneration-backwashing. A. True B. False