From which of the following effect colloidal system is free - gravitational Concentration of electrolyte heat applied electrical field.
In peptisation reaction - colloid coverts in precipitates precipitates converts in calloid true solution is formed from suspention particels. true solution is formed by dissolving precipitates.
Which of the following is an example of homogeneous catalysis - Acidic hydrolysis of methyl acetate Catalytic conversion in methanol from water gas Catalytic conversion in SO3 from SO2 by contact process Synthesis of NH3 by Haber’s process
Which of the following is appropriate - Emulsion - butter milk Aerosol - smoke Foam - fogs Solid sol - cake
0.25g of starch sol is required to prevent coagulation of 10 ml gold sol when 1 ml of 10% NaCl solut 0.25 2.5 250 0.025
When light passes through colloidal solution it....... is reflected is refracted is scattered does not affect
In a case of auto-catalysis - (reactant act as a catalyst heat involved during reaction, act as a catalyst product act as a catalyst solvent act as a catalyst
Which of the following property is true ? The particles of colloid can diffuse slowly through semipermeable membrane The particles of colloid can not be settle down under the influence of gravitational force. The particle of colloid can not be observed by ultra microscope. All of the above
According to the adsorption theory of catalysis, the speed of the reaction increases because - Adsorption produces heat which increases the speed of the reaction. Adsorption lowers the activation energy of the reaction The concentration of reactant molecules at the active centres of the catalyst becomes high due to adsorption. In the process of adsorption, the activation energy of the molecules become large
When the rate of physical adsorption will increase - By reducing pressure By reducing temperature By increasing temperature (a) and (c) both