Explain clearly how the phenomenon of adsorption finds applications in
(i) production of vacuum in a vessel
(ii) heterogeneous cataysis
(iii) Froth floatation process in metallurgy

Explain how the phenomenon of adsorption finds application in each of the following processes: (i) Production of vacuum (ii) Heterogeneous catalysis (iii) Froth floatation process

Explain how the phenomenon of pdsorption finds application in each of the following processes : (i) Production of vacuum (ii) Heterogeneous catalysis (iii) Froth Floatation process

(a) A colloidal sol is prepared by the given method in figure. What is the charge of AgI colloidal particles in the test tube ? How is the sol formed, represented? (b) Explain how the phenomenon of adsorption finds application in Heterogeneous catalysis. (c) Which of the following electroytes is the most effective for the coagulation of Fe(OH)_(3) sol which is a positively charged sol? NaCI, Na_(2)SO_(4), Na_(3)PO_(4)

(i) Name the method of refining to obtain silicon of high purity. (ii) What is the role of SiO_2 in the extraction of copper? (iii) What is the role of depressants in froth floatation process ?

(a) Write the principle involved in the vapour phase refining of metals. (b) Write the name of the metal refined by each of the following processes : (i) Mond process (ii) van Arkel method (c ) What is the role of depresent in froth floatation process ?

In which of the following process adsorption plays an important role? (a) Froth floatation process (b) Chromatographic analysis (c) Control of humidity (d) heterogeneous catalysis

Describe the following: (i) Role of depressant in forth floatation process. (ii) Role of silica in the metallurgy of copper.

State and explain first law of thermodynamics. Discuss the application of first law of thermodynamics to (i) isothermal process, (ii) adiabatic process.

Identify the correct order of steps in heterogeneous catalysis. (i) Adsorption of reactant molecules on the surface of the catalyst. (ii) Diffusion of reactant to the surface of the catalyst. (iii) Formation of reactions product on the catalyst surface. (iv) Diffusion of reactions product from the catalyst surface. (v) Formation of activated intermediate.

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