BSc Chemistry SEM V 2019 20 Oct 2019-20 CHEMISTRY INORGANIC CHEMISTRY 11.10.19 Question Paper - Mumbai University | munotes

Questions asked in this paper

• (2) Figures to the right indicate full marks

1. Q1 Attempt any four of the following :
   • A. Give an account of the following with suitable examples: 5
   • B. Discuss the point group assigned to diatomic linear molecules . 5
   • C. Compare homonuclear and heteronuclear diatomic molecules 5
   • D. Discuss using Walsh diagram, H3*ion is triangular . 5
   • E. Draw the molecular orbital energy level diagram for H2O molecule. Comment on 5 its magnetic property
   • F. (i) Write in short the importance of symmetry in chemistry.(2 points) 2 Explain in molecule, the 3pz orbital of chlorine is involved in bonding with 3
2. Q2 Attempt any four of the following:
   • A. What are lattice parameters. Derive a relationship between lattice constant (a) of a cubic crystal and density of the crystal material. 5
   • B. Show that packing factor for body centered cubic (bcc) lattice is 0.68. 5
   • C. For a simple cubic (sc) unit cell - 5
   • (1) Calculate the number of atoms per unit cell (sc)
   • (ii) Find the atomic radii (r) of a metal which crystallises in sc structure with length of unit cell 326 pm
   • D. With suitable example, explain Frenkel defect in ionic solids. 5
   • E. Write a short note on conventional superconductor . 5
   • F. Explain the terms: 5
   • (11) Ideal and hard superconductors
3. Q3 Answer any four of the following What are inner transition elements? 2 (it) Give reason, lanthanide shows +3 as their common oxidation states. 3
   • B. Explain magnetic properties of lanthanides ions are different from those of 5
   • C. Give the factors affecting the rate of ion exchange and explain the role of 5 complexing agent in elution of lanthanide ions, by ion exchange method
   • D. Give reasons:
   • (i) Yttrium occurs invariably with some lanthanides. 2
   • (ii) Post lanthanides have abnormal high densities. 3
   • E. On the basis of electronic configuration of lanthanides, explain the colour of 5 lanthanide ions in solution or their compounds
   • F. Give the commercial and nuclear applications of lanthanides. 5
4. Q4 Attempt any four of the following:
   • A. What are acid, basic and amphiprotic solvents? Explain with suitable examples. 5
   • B. Name the oxyacids of chlorine. Discuss their acid strength in detail. 5
   • C. Write a short note on metal-ammonia solutions. 5
   • D. Discuss the structure of XY7 type of interhalogens with suitable examples. 5
   • E. Give the three steps involved in the formation of Sulphuric acid. Explain the effect. 5 of pressure on the formation of SOs
   • F. Discuss the allotropic forms of Oxygen. 5
5. Q5 Answer the following :
   • A. State whether the following statements are true or false: (Any five) 5
   • a. Hydrogen molecule belongs to Coovpoint group
   • b. Centre of inversion is absent in molecule
   • c. NO forms NO* ,the single electron is lost from antibonding orbital
   • d. Bond order of CO molecule is 3
   • e. Trans-dichloroethylene belongs to C2n point group
   • f. Coov is the higher symmetry point group
   • g. Photoelectron spectrum of water shows two bands
   • h. Though and molecule have same number of peripheral atoms their structures are different
   • B. Select and write the appropriate answer (any five): 5
   • a. AB AB --- type of arrangement of spheres is close packing
   • b. The number of atoms in face-centered cubic unit
   • c.In Schottky defect of ionic solids, is missing
   • (i) a cation (ii) an anion (iii) both cation and anion
   • d. The effect of ejecting out the flux lines of magnetic field by a superconductor is
   • e. In Coo Fullerene there five membered rings
   • f. Presence of foreign atoms in ionic crystals leads to defect
   • g. Coordination number in face centered cubic lattice is:
   • (i) 6 (ii) 8 (iii) 12
   • h. A point in crystal lattice signifies __ of particles
   • (i) size (ii) volume position of the centre
   • C. Fill in the blank by choosing the appropriate answer from below(any five) 5
   • a. Solvent extraction is based on law
   • c. bis(2-ethylhexyl) phosphoric acid is less susceptible to as compared to
   • d. is less reactive (noble) because of lanthanide contraction
   • e. is a Silicate of lanthanides
   • f. La** ion is hydrated
   • D. Match the Columns: (any five) 5 f Catalyst in manufacture of HCl Oxidation state of Group-16 | 7 Bent T-shape

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