M.Sc. (Semester IV) (CBCS) Examination Mar/Apr-2018
Analytical Chemistry
INSTRUMENTAL METHODS OF ANALYSIS II
Time: 2½ Hours
Max. Marks: 70
Instructions: Attempt in all five questions. Section I is compulsory. Attempt any two questions from Section II and any two questions from Section III. Answer to all question (Section II and III) should be written in the one answer book. All questions carry equal marks. Figures to the right indicate full marks. Use of log table and calculator is allowed.
Section I
Q.1
Answer the following.
14
List different types of emission spectra.
Give the X-ray wavelength region of electromagnetic spectrum.
What is critical angle principle?
Write Bragg's equation.
For very dilute suspensions, the most sensitive technique is
Nephelometry
Turbidimetry
Colorimetry
Photometry
The R.I. of methyl acetate is 1.3614 at 293 K. Calculate RM. (density 0.933 g/cm3)
Mention different radiationless photophysical pathways.
Give the mathematical equation for Beer-Lambert's law.
Write the Maxwell-Boltzmann distribution law.
Mention any two fluorescence standards.
Define chemiluminescence.
State Kasha's rule
The highest flame temperature is obtained in oxygen with
Define atomization.
Section II
Q.2
Mention different X-ray diffraction methods. Describe the powder crystal diffraction method.
07
Discuss various components encountered in double beam spectrofluoro -photometer.
07
Q.3
Write on applications of turbidimetery.
07
Give an outline of general techniques utilized in surface spectroscopy.
07
Q.4
Illustrate different types of flames used in flame photometery.
07
Describe the specific applications of emission spectroscopy.
07
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SLR-UF-238
Section III
Q.5
Illustrate different factors which contributes to atomic spectral line widths.
05
Comment on advantages and disadvantages of XRF technique.
05
What do you know about the rotating disc phosphoroscope?
04
Q.6
Discuss the use of Bragg's equation in X-ray spectroscopy.
05
Write on limitations of flame photometry.
05
With the help of Joblonski's diagram, show various photophysical pathways.
04
Q.7
Write a note on any Three of the following.
14
Sampling of surfaces
Quantum efficiency
The theory of refractometry
Applications of nephelometry