BSc Chemistry SEM V ATKT May 2018-19 ATKT CHEMISTRY INORGANIC CHEMISTRY Question Paper - Mumbai University | munotes

Questions asked in this paper

• (2) Figures to the right indicate full marks

1. Q1 Answer Any Four of the following:
   • (A) Discuss the following symmetry elements with one example each. 5
   • (a) centre of symmetry (b) identity
   • (B) Discuss the constituents of point group with reference to boron trichloride molecule
   • (C) (a) Compare homonuclear and heteronuclear diatomic molecules. 3
   • (b) What is point group? 2
   • (D) Draw the molecular orbital diagram for CO (without mixing of orbitals) and 5 explain its bond order
   • (E) Draw the molecular orbital energy level diagram for 5
   • (F) Write note on structure of H3* ion on the basis of molecular orbital theory. 5
2. Q2 Answer Any Four of the following:
   • (A) What do you understand by packing density or atomic packing factor? Show that 5 packing factor for the bec structure is or 68%
   • (B) Show that the packing factor for fec lattice is V2 2/6 or 74%. 5
   • (C) Platinum crystallises in face centered cubic (fcc) crystal with a unit length of 5 Calculate the density and atomic radius of platinum (Mass of 1 mol. of Pt is 195.08)
   • (D) Define the following terms in crystal structure study
   • (a) space lattice 3
   • (b) lattice points 2
   • (E) Give the applications of superconducting materials. 5
   • (F) (a) With a neat diagram, discuss Meissner effect. 3
   • (b)Differentiate between Schottky and Frenkel defects. 2
3. Q3 Answer Any Four of the following:
   • (A) Discuss the position of lanthanides in the periodic table. Give observed 5 electronic configurations of Cerium, Gadolinium, Terbium and Lutecium
   • (B) Explain magnetic properties exhibited by lanthanides. 5
   • (C) How are lanthanides separated from each other by solvent extraction method? 5
   • (D) What is lanthanide contraction? Explain its consequences on the members of the 5
   • (E) Write a note on complex formation tendency of lanthanides. 5
   • (F) Give any five applications of lanthanides. 5 Answer Any Four of the following:
   • (A) What are protonic and aprotic solvents? Explain with suitable examples. 5
   • (B) With reference to liquid ammonia as nonaqueous solvent, give balanced 5 equations for (1) Acid-base reactions, (ii) Redox reactions
   • (C) Explain trends in the physical properties of group 16 elements with regard to 5
   • (D) What is allotropy? Explain in brief allotropic modifications of the 5 members of group 16
   • (E) Discuss anomalous behavior of fluorine. 5
   • (F) Explain with diagram, structure and bonding in (1) Hypochlorite ion 5
4. Q5 A. State whether the following statements are true or false: - (Attempt any five) 5 marks
   • (a) The rotation axis Cy for water is C2
   • (b) The symbol Cn means; C is cycle and n is order of axis
   • (c) Ammonia molecule belongs to C3y point group
   • (d) Atomic orbitals are monocentric and molecular orbitals are polycentric
   • (e) NO molecule is diamagnetic in nature
   • (f) In HCI molecule, the 3p orbital of chlorine involved in bonding is 3px
   • (g) The photoelectron spectrum of shows two bands
   • (h) The diagrams which show the change in energy of molecular orbitals with variation in bond angle are called molecular orbital diagrams
   • B. Fill in the blanks with appropriate words given in the bracket: - 5 (Attempt any five)
   • (a) Unit cell is the geometrical portion of the crystal which can be used to build up the
   • (b) Closest packing is the way of arranging in space so that available space is filled
   • (c) Atomic packing factor (APF) is defined as the fraction of space occupied by atoms in a
   • (d) In two dimensions closest packing, each sphere is in contact with other sphere
   • (e) The number of nearest neighbours for an atom is called
   • (f) is an example of superconductors
   • (g) Critical temperature is a temperature below which material shows ___ resistance
   • C. write appropriate answer:- (Attempt Any Five) 5
   • (a) In addition to oxidation state terbium also exhibits oxidation state
   • (b) Electronic configuration of Uranium is
   • (i) (ii) (iii)
   • (d) Yb** is isoelectronic with
   • (e) Absorption spectra of lanthanides
   • (f) Cerium is very state
   • (i) +1 (ii) +2 +4
   • (g) is colourless in +3 oxidation state
   • (h) Only lanthanide member which is radioactive is
   • D. the columns:- (Attempt Any Five) 5
   • (c) Manufacture of Sulphuric acid Pentagonal bipyramidal geometry
   • (e) CIF3 (v) Fluorine
   • (f) IF; (vi) Chlorine

Read from the scan above, so a character or two may differ. The scan is the original.