(DCHE 01)
M.Sc. Chemistry (Previous) DEGREE EXAMINATION, DECEMBER 2005.
Paper I - GENERAL CHEMISTRY
Time : Three hours
Maximum : 100 marks
Answer ALL questions
UNIT I
1.
(a) Explain briefly the origin of any four types of molecular spectra.
(10)
Or
(b) Discuss the allowed transitions in the rotational energy levels of molecules.
(10)
2.
(a)
(i) Give an account of isotopic effect in rotational spectra.
(7)
(ii) Describe the spectra of rigid and nonrigid rotor systems.
(8)
Or
(b)
(i) What are the sources of radiation and detectors used in recording the NMR and ESR
spectra of molecules.
(7)
(ii) Give an account of microwave spectra of linear molecules.
(8)
UNIT II
3.
(a) Explain the origin of electronic spectra of molecules.
(10)
Or
(b) Give an account of vibrational energy levels and transitions of a diatomic molecule.
(10)
4.
(a) Give an account of vibrational structure of an electronic transition.
(15)
Or
(b) Discuss the vibrational and rotational spectra of diatomic molecules.
(15)
UNIT III
5.
(a) Give the importance of samping techniques used for different forms of substances.
(10)
Or
(b) Explain the importance of ‘Accuracy’ and ‘Precision’ in analytical determinations.
(10)
6.
(a) Discuss the types of errors encountered in chemical analyses.
(15)
Or
(b) What is meant by mean, median, average deviation relative deviation and standard deviation?
Calculate the above parameters for the following data. The normality of a solution determined
by four individuals is, 0.2041, 0.2049, 0.2039 and 0.2043.
(15)
UNIT IV
7.
(a) Compare the features of mainframe, micro and super computers.
(10)
Or
(b) Describe the format of different assignment statements used in FORTRAN.
(10)
8.
(a) Write a FORTRAN program to calculate the rate constant of a first order reaction from the
observed kinetic data.
(15)
Or
(b) Write a FORTRAN program to calculate and print the pressure of a vander Waal’s gas, given
the volume, temperature and vander Waal’s constants.
(15)
(DCHE 02)
M.Sc. Chemistry (Previous) DEGREE EXAMINATION, DECEMBER 2005.