BSc Chemistry SEM V 2016 17 2016-17 Chemistry Paper II Inorganic Chemistry Question Paper - Mumbai University | munotes

Questions asked in this paper

• (2) Figures to the right indicate full marks

1. Q1 Attempt any three of the following :
   • (A) Identify the symmetry elements and assign point groups to and 5
   • (B) Give an account of the following with suitable examples. 5
   • (i) Plane of symmetry
   • (ii) Identity
   • (C) Explain symmetry elements and assign a point BCI, molecule 5 with proper diagrams
   • (D) Draw aneat labelled M O diagram for BeH, molecule. Give its structure 5 and magnetic property 3 (E) Write the wave equations for the formation of molecular orbitals in 5 = molecule (MO diagram not expected) 8 (F) Explain the term extrinsic semiconductors. Discuss n-type 5 semiconductors with suitable examples 6 2. Attempt any three of the following :
   • (A) What is Atomic Paking Factor (APF)? Show that packing factor for 5 cubic (sc) lattice is 0.52
   • (B) For a body centred cubic (bcc) unit cell - 5
   • (i) Calculate the number of atoms per unit cell (bcc)
   • (ii) Find the atomic radii (r) of a metal which crytallises in bec structure with length of unit cell 286 pm crystallises cut in face centered cubic structure (fcc). Calcuiate the molar mass (M) and atomic radii (r) if the length of unit cell (a) is 404 pm and density of metal is 2.7 g/cm’. Avagadro's no. (N) is
   • (D) Define Point defect. 5 Describe various types of point defects observed in the crystal
   • (E) Explain with the help of a diagram 5
   • (i) Lattice and Lattice Points
   • (ii) Effect 5
   • (F) Give a brief account of Alkali metal fullerides
2. Q3 Attempt any three of the following :
   • (A) What are inner transition elements? Name the elements of second 5 inner transition series and write their electronic configuation
   • (B) What is lanthanide contraction? Discuss it's effect on post lanthanons. 5
   • (C) (i) Discuss the position of 4f and 5f block elements in the periodic 2
   • (ii) Discuss the applications of lanthanides. 3
   • (D) Explain : 5
   • (i) absorption spectra of lanthanide ions are not affected by
   • (ii) and Eu are very stable ions
   • (E) Discuss the TBP solvent extraction method for the separation of 5
   • (F) Give the dissimilarities between the elements andactinide
3. Q4 Attempt any three of the following :
   • (A) Distinguish between the following. 5
   • (i) Protonic and aprotic Solvents
   • (ii) and non ionizing solvents
   • (B) Explain the following : 5
   • (i) Supercritical CO, liquid is the most suitable non aqueous solvents for analytical purposes
   • (ii) Applications of ionic liquids
   • (C) Discuss the preparation and bonding of interhalogen of the type XY 5 with suitable example
   • (D) What are pseudohalogens? Discuss the methods of preparation and 5 structure of selenocyanogen
   • (E) Discuss the methods of preparation, properties and bonding of
   • (F) (i) Explain with equation, XeF, cannot be store in glass vessels. 3
   • (ii) Explain ammonia is 'Water like' solvent. 2
4. Q5 Answer the following 4 marks
   • (A) Select and write the most appropriate answer
   • (a) H, molecule belongs to point group
   • (i) (ii) (ii) D,h
   • (b) The molecule having centre of symmetry is
   • (c) H,* ion molecule has _ valence electrons
   • (d) The collection of very closely spaced energy levels is called
5. Q5 (A) St@te whether the following statements are true or false. 4 marks
   • (p) The point group associated with NH, molecule is C,v \(q) According to symmetry rules label 'e' denotes doubly degenerate
   • (r) Photoelectron spectrum of water shows two bands
   • (s) p-type semiconductor is obtained when silicon is doped with = 5. (B) Select and write the most appropriate answer. 4 5 (a) AB AB --- type of arrangement of spheres is found in
   • (iii) hexagonal 3 (b) The number of atoms in face-centered cubic unit cell is
   • (c) In Schottky defect ofionic solids, missing Ss (ii) an anion both cation and anion
   • (d) Conventional superconductors require for cooling
   • (i) liquid Helium
6. Q5 (B) State whether the following statements are true or false. 4 marks
   • (p) Packing density for face centred cubic lattice is 0.68
   • (q) Nearest neighbour distance in hexagonal close pack lattice is a= 2r lonic crystals with low coordination number show Frenkel defect
   • (s) YBa, Cu,0, is an example of Organic superconductor Select and write the most appropriate answer. 4
   • (a) The lanthanide ion that is colourless is
   • (iii) Ho
   • (b) Compared to lanthanides, actinides show tendency to
   • (c) The electronic configuation of Lutecium is
   • (d) Uranium is powerful
   • (i) agent > (C) State whether the following statements are true or false. 4 {p) The lanthanide ion that is diamagnetic is 3 (q) Most of the tripositive lanthanide ions are characterized by well
   • (r) In actinides the additional electron enters in 4f
   • (s) The series starting with Lawrencium and ending with Thorium is called as actinide series 5 (D) Select and write the most appropriate answer . 3
   • (a) Ionic liquids are non-aqueous solvents, capable of dissolving a wide range of compounds
   • (b) In interhalogen compounds, the less electronegative halogen exhibits oxidation state
   • (c) The halogenoids are also called as
   • (i) halides
   • (ii) pseudohalogens
   • (iii) pseudohalides
7. Q5 (D) State whether the following statements are true or false. 3 marks
   • (p) Iodine heptafluoride is the only one interhalogen compound of
   • (q) Chemical formula for selenocyanogen is (SeCN),
   • (r) The electronic configuration of xenon is [Kr] 5s? ,

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