<p> M.Sc. Chemistry II (Second) Semester Examination 2015-16</p><p>Course Code: MCH202 Paper ID: 0172102</p><p>Inorganic Chemistry-II Time: 3 Hours Max. Marks: 70 </p><p>Max Marks: 75</p><p>Note: Attempt six questions in all. Q. No. 1 is compulsory.</p><p>1. Answer any five of the following (limit your answer to 50 words): (4x5=20) a) Explain why nanomaterials are used in cosmetics. b) How [NPCl2] is prepared? Give its reaction with sodium alkoxide. c) Calculate the effective atomic number of the following: i) Fe(CO)3(C4H4)</p><p> ii) W(CO)3(Me3Si)(-C5H5) 2- 2- d) Compare the structures of SO4 and S2O3 . e) Write the uses of soluble sodium silicate. f) How triethylboron is prepared? Write its equation. g) What are the main sources of sulphur? Which are the two most common allotropic forms? h) Explain why liquid oxygen sticks to the poles of a magnet but liquid nitrogen does not.</p><p>2 Compare the structures of oxides and sulphides of phosphorous. (10) 3. Draw the structures of six different types of silicates. Give name and formula with one example of each. (10)</p><p>4. Write short notes on the following: (5+5) a) Single and multi walled nanotubes b) Polymorphism of sulphur</p><p>5. Explain with the help of examples the redox reactions on Cr(III) and Ru(II) complexes. (10)</p><p>6. Write the synthesis, properties and application of silver nanoparticles. (10)</p><p>7. a) Write two methods for preparing organometallic compounds. (5) b) Write the industrial applications of organometallic compounds. (5)</p><p>8. What is photo-chromism and phhotochromic complexes? Write their applications. (10)</p>