Industrial Catalysts — DU B.Sc. (Prog.) Applied Physical Sciences with Industrial Chemistry Previous Year Question Papers

(c) Kinetics of enzyme - catalysed reaction Industrial Chemistry 1. (a) Calculate the turnover number for a reaction with 0.15 moles of reactant, 0.015 moles of catalyst and 40% product yield? (b) What factors determine whether a catalyst can be regenerated or must be replaced ? (c) Explain the difference between a promoter and a co - catalyst. 5+5+5=15 2. (a) Name the Wilkinson's catalyst. How does Wilkinson's catalyst facilitațe the hydrogenation of alkenes ? Explain the mechanism. (b) Explain Langmuir - Hinshelwood mechanism , for heterogenous process. (c) Explain the role of photocatalysts in the • degradation of organic pollutants. 3, (a) What is the chemical composition of áspartame ? Describe its synthesis using a biocatalyst and its commercial availability. (b) Explain the followings: (i) Structure of"4 - Hydroxyphenoxy propionic acid and one application. (ii) Induced fit model. (c) What is Ziegler - Natta, catalysts ? How the modifications of Ziegler - Natta catalysts I improving polymerization processes? 4. (a) Write the chemical composition, structure and types of zeolites. (b) Describe the mechanism of water oxidation facilitated by a photocatalyst. (c) What is the significance of autocatalysis in biochemical processes ? 5+5+5=15 5. (a) Explain the process of photocatalysts ? Mention any two active components commonly used as photocatalysts. (b) Define water hardness and explain the methods used to remove both temporary and permanent hardness. (c) Write two reactions which shows the catalytic properties of zeolite. 6. Explain the following terms briefly: (a) Catalytic poison