Indian Institute of Technology Kharagpur (IIT-K) 2008 M.Sc Chemistry Inorganic mid sem - Question Paper
INDIAN INSTITUTE OF TECHNOLOGY, KHARAGPUR Mid-Autumn Semester Exam. Sep. 2008 for CY20103 - Inorganic Chemistry x Department of Chemistry; No. of students: 5; Full marks: 50; Time: 2 hrs
Part A: Answer five questions 2x5 = 10 marks
ylWhat are the experimental evidence for the wave and the particle nature of an electron?
Write the wave equation for the hydrogen atom
vX'What are the interstitial sites of close packed arrangements? How many interstitial sites of each type is present in them?
Jt. What is the crystal structure for the followings: SrF2, IPtCU
5. Unlike s orbital p orbitals are not spherically symmetrical, why?
The ionization energy of nitrogen atom is greater than that of oxygen, Why?
Part B: Answer five questions 4 x5 = 20 marks
\jf. Among the 3s, 3p and 3d orbitals which is more penetrating and why? Explain with diagrams.
JZ. WTien n = 3. what are the orbitals possible and which of these is described as gerade? > v '
3. What is the ground state term symbol for d3. and p2? and why? ? * * *
jfT Which is more ionic and why?
j# CapL or MgCfe, b) NapI or CuCl, c) Lipl or Lil. d) AICI3 or SjCh
[ Write the Lewis dot structure of C032-, and PF5.
Jb. Write the electron configuration of Mn2+ and calculate the magnitude of the spin magnetic moment (jis) in Bohr magnetons. Atomic number of Mn is 25.
Part C: Answer all questions 10 x 2 = 20 marks
Calculate the lattice energy, the heat of formation and the heat of disproportionation of CaCl: A - 1.75; N = 6.023 x 1023 ion pairs mol1; Z+- 1; Z = -1; e = 1.60218 x 10-19 C; n = 3.1415; e 0 - 8.854188x 10-12 C2rVrG = 2.9x 10_l m; n = 9; AHSUbi = 201 kJ; AHjiss =121 kJ; IE = 589 kJ; EA = -349 kJ.
jC. Using band theory explain conduction mechanism of n-type and* p-type semiconductors. Give examples.
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