Which type of process adsorption is ? Isotonic Isochonic Endothermic Exothermic
Which of the following is good adsorbent ? Silica gel Alumina Clay All of the above
Which of the following processes is adsorption phenomenon ? Soakd of rayon clothes in coloured solution Contact between silica gel and vapour of water Contact between anhydrous CaCl2 and vapour of water H2S gas in contact to water
Due to adsorption surface energy increases surface energy becomes zero surface energy decreases no change occurs in surface energy
How much pascal high vacuum is required to achive completely pure surface of metal? 10-8 to 10-9 10-8 to 10-10 10-6 to 10-9 10-8 to 10-7
Which of the following phenomenon in not involved in surface chemistry ?
Elecrode reactions Dissolution Heterogeneous catalysis Liquid and its vapour taken in closed vessel.
On which factors interface depends ? Size of the molecules in the bulk phase. Wieght of the molecules in the bulk phase. Numbers of molucules in the bulk phase. Physical state of molucules in the bulk phase.
Gold number of protective colloids A,B,C & D are 0.50,0.01,0.10 and 0.005 respectively. The correct A B A D
Blood may be purified by : Electro osmosis Coagulation Filtration Dialysis
which among the following is lyophilic colloid : Blood Gum Fog Milk