判断题JT（True or false JT）.docVIP

判断题JT（True or false JT） True or false 1. Sol is homogeneous system and is stable in thermodynamics. (fx) 2. Long time dialysis is conducive to the purification and stability of sol. (x) 3. The presence of Tyndall effect is one of the main differences between sol and molecular dispersion systems. (fx) The Tyndall effect of the lyophilic sol is stronger than the loathing. (x) 5. In the plus dc field, the silver iodide is moving to the negative electrode and its diffusion layer is moving towards the positive electrode. (fx) 6. In the newly formed Fe (OH) 3 precipitation, a small amount of dilute fecunl3 solution is added, which will dissolve, and a certain amount of sulfate solution will be precipitated. (fx) 7, the butyl effect is caused by the refracting effect of sol particles on incident light. (x) 8. Micellar solution is a highly dispersed homogeneous thermodynamic stabilization system. (fx) The diffusion process of the colloidal particles and the Brownian motion are essentially the macroscopic orientation migrations occurring in the thermal motion of the particles. (fx) 10. Adding electrolytes to the solution has no effect on electrophoresis. (x) 11. Since the macromolecular solution is a true solution, it is the homogeneous thermodynamic stability system, so it has no dindar effect. (x) When the surface active substance is added to the solvent, the result is d gamma/dc 0, which is adsorption. (fx) The adsorption force of physical adsorption is derived from van der Waals force, and its adsorption is generally not selective. (fx) Tiny crystals have less solubility than normal crystals. (x) The surface tension of matter is related to the size of surface area. (x) 16. Surfactant cannot change surface wettability. (x) 17. The main purpose of BET formula is to obtain the adsorption mechanism under high pressure. (x) 18. Additional pressure generated by the curved surface may not be equal to zero. (x) The gelatine of colloidal particles is a reflection of its own ther