BSc Chemistry SEM V 2018 19 2018-19 Chemistry Inorganic Chemistry 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. Classify the symmetry operations with suitable examples.Give symmetry 5 elements associated with them
   • B. Discuss the symmetry operations and assign the point group to NH3 molecule. 5
   • C. Draw a neat well labelled Molecular Orbital diagram of BeH2 molecule. 5 Give its property and molecular configuration
   • D. Describe the molecular orbital energy level diagram of CO with respect to 5 bond order and magnetic property (Hybridisation not required)
   • E. Explain the geometry of H3* ion on the basis of Walsh diagram and molecular 5
   • F.a. Explain why covalent bond energy in heteronuclear diatomic reduced. 3
   • b. Define: (1) Symmetry. Operation (ii) Order of group 2
2. Q2 Attempt any four of the following:
   • A. Explain with the help of a diagram: 5
   • B. Define Packing density.Show that packing density for simple cubic lattice is 0.52 5
   • C. For a face centered cubic (fcc) lattice, calculate: 5
   • (1) Number of atoms per unit cell (fcc)
   • (11) Lattice constant (a), if atomic radii (r) of a metal is 138 pm,
   • D. With suitable example, explain Schottky defect in ionic solids. 5
   • E. Explain the terms: 5
   • F. Write a short note on Fullerenes and Alkali metal fullerides. 5
3. Q3 Answer any four of the following
   • A. aref-block elements? Give the ideal and observed electronic 5 configurations of actinides
   • B. Explain the spectral properties of lanthanides. 5
   • C. Explain the method of separation of lanthanides from each other by ion 5
   • D. Give reasons: Post lanthanide elements have abnormal high densities. 3
   • (ii) Cerium can forms compounds with +4 oxidation state. 2
   • E. Explain the oxidation states of lanthanides on the basis there electronic 5
   • F. Give the applications of lanthanides. 5
4. Q4 Attempt any four of the following:
   • A. What are ionizing and nonionizing solvents? Explain with suitable examples. 5
   • B. With reference to liquid Dinitrogen tetroxide as a solvent, give 5 balanced equations of (i) Acid base reactions (any two)
   • (11) Redox reaction with metals (any two)
   • C. Name the oxyacids of Chlorine. Discuss the structure of any two on the basis of 5
   • D. Give any two preparations and any three properties of interhalogens. 5
   • E. With reference to the elements of Group-16, discuss the following: 5
   • F. Discuss the role of V2Os catalyst in the oxidation of SO2 to SOs. 5
5. Q5 Answer the following :
   • A. Match the (Any five) 5
   • e) NO molecule v) monocentric
   • g) Atomic orbitals
   • h) HCl Vill) 1
   • ix) Coy
   • B. Select and write the appropriate answer. 5
   • a. AB — AB type of arrangement of spheres is found in close packing
   • b. Voids in body centered cubic lattice is
   • c. Due to Frenkel defect in ionic solids, density
   • d. Nb3Sn is an example of superconductor
   • e. A point in crystal lattice signifies of particles
   • (i) size (ii) volume position of centre
   • f. Frenkel defect occurs in
   • g. The coordination number in body centered cubic lattice is
   • (i) 6 (ii) 8 (iii) 12
   • h. High temperature superconductors for cooling
   • C. State whether the following statements are true or false (any five) 5
   • a. Colour of lanthanide ions is mainly because of charge transfer transitions
   • b. Outer electronic configuration of Dy** is [Xe]
   • d. Nobel character of Ir may be attributed to lanthanide contraction
   • e. An average separation factor of 1.5 is achieved for adjacent lanthanides in
   • f. Compounds of oxidising agents
   • g. La** has zero magnetic moment
   • D. Fill in the blank with appropriate words given below (any five): 5
   • a. Among the following is an aprotic solvent
   • c. One of the products of autoionisation of liquid NH3 is
   • d. Elements of Group-17 need only electrons to complete their octet
   • e. does not form an oxyacid
   • f. An allotropic form of oxygen is
   • g. is used to absorb Sulphur trioxide in Contact Process

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