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Pune University - SY BSc (Sem - II) CHEMISTRY - I, April 2010

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Total No. of Questions :4] [Total No. of Pages : 2 [3717] - 205 S.Y. B.Sc. CHEMISTRY - I CH : 221 Inorganic Chemistry (New Course) (Sem. - II) P483 Time :2 Hours] [Max. Marks : 40 Instructions to the candidates: 1) All questions are compulsory. 2) Figures to the right indicate full marks. 3) Neat diagrams must be drawn wherever necessary. Q1) Attempt the following : a) What is gangue? b) When Bayer s process is used? c) Name products of Blast Furnace. d) Draw structure of B2 H6. e) Minamata incident is due to which metalion. f) What are conjugate acid-base pair? g) Why transition metal forms complexes? h) What is corrosion? i) Why HClO4 is stronger acid than HClO3? j) [10] Explain term diamagnetism. Q2) Attempt any two of the following : a) [10] Write the names, symbols and electronic configurations of III A group and Explain trends in the following properties of these element. i) Size of Atoms. ii) Oxidation State. b) Explain concept of Acid-Base according to Lux-Flood concept with suitable examples. c) Answer the following : i) ii) Explain the process of concentration of ore by leaching process. Explain biochemical effect of Cadmium. P.T.O. Q3) Attempt any two of the following : a) [10] What are a block elements? Show their position in the periodic table. Explain following properties. i) ii) Size of atoms and ions. Colour. b) Describe construction and working of electrolytic cell used for extraction of Aluminium. c) What is passivity? Explain oxide film theory with evidences. Q4) a) Attempt any one of the following : [6] i) ii) b) Explain with diagram L.D process of making steel. What are its advantage? Sketch neat labelled diagram of Blast Furnace. Give working of blast furnace. Attempt any one of the following : [4] i) What is anomalous behaviour? Explain with reference to oxygen. ii) Explain with suitable example concept of Hard & Soft acid base. iii) Give any two factors affecting rate of immersed corrosion. #### [3717]-205 2

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Additional Info : S.Y. B.Sc. Chemistry (Semister - II), CH - 221 : Inorganic Chemistry (New Course), Pune University
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