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BSc (VI Semester) Examination
CHEMISTRY
Paper : CHEM–362
( Inorganic Chemistry )
Full Marks : 80
Pass Marks : 35%
Time : Three Hours
Note : 1. Answer all questions.
2. The figures in the margin indicate full marks for the questions.
3. The symbols used are of usual meaning.
1. Answer any five questions : 2×5=10
(a) Define crystal field stabilization energy (CFSE). Calculate CFSE for high-spin system.
(b) What are phosphazenes? Draw the structure of .
(c) What is Ziegler-Natta catalyst? Draw its structure.
(d) Write down the IUPAC names of the following compounds :
(i)
(ii)
(e) What is poisoning of enzyme? How does it happen?
(f) Give two important roles played by calcium in biological system.
(g) Define spectrochemical series.
2. Answer any four questions : 5×4=20
(a) Draw and explain the splitting of d-orbitals in square planar complexes. 5
(b) Give a brief description of the properties of silicones. 5
(c) Discuss the synergic effect of bonding in metal carbonyls. 5
(d) Write a note on the mechanism of hydrogenation of alkene. 5
(e) What is nitrogen fixation? Explain the steps involved in nitrogen fixation. 2+3=5
(f) Discuss the toxic effects of lead and mercury. 5
3. Answer any five questions : 10×5=50
(a) What are the postulates of crystal field theory (CFT)? What are the advantages of CFT with reference to valence bond theory (VBT)? 6+4=10
(b) How is borazine prepared? Discuss the structure and properties of borazine. 2+8=10
(c) What is hapticity of ligands? Discuss how organic ligands are classified on the basis of hapticity with examples. 2+8=10
(d) Write a brief note on synthesis and properties of ferrocene. 10
(e) Discuss the role of alkali metal ions in biological systems. 10
(f) Write two methods for the synthesis of mononuclear carbonyls. Draw the structures of the following dinuclear carbonyls : 10
(g) Discuss the active site structure of haemoglobin and its role in living system. 10
