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

In a heterogeneous catalysis which of the following processes takes place

(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 ?

Describe the principle controlling each of the following processes: (i) Vapour phase refining of titanium metal. (ii) Froth floatation method of concetration of a sulphide ore

Write principle behind the following : (i) Vapour phase refining (ii) Chromatography (iii) Froth flatation process.

Which of the following process/processes release heat ? (i) condensation (ii) vaporisation (iii) freezing (iv) melting