M.Sc. (Semester IV) (CBCS) Examination Nov/Dec-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 section III. Answer to all questions (Section II and III) should be written in same answer book. All questions carry equal mark. Figures to right indicate full marks. Use of log table and calculator is allowed.
Section I
Q.1
Answer the following:
14
Mention various surface characterization techniques.
With regard to Bragg equation, which parameter is unknown in x-ray diffraction procedures?
What do you mean by refractive index?
What is the basis of nephelometry?
For very dilute suspensions, the most sensitive techniques is
nephelometry
turbidimetry
colorimetry
photometry
List different types of emission spectra.
What is resonance fluorescence.
What is the relationship between absorbance and transmittance?
Calculate the frequency in Hz of X-ray with wavelength of 3.0 Å.
Fluorescence methods are 10 to 1000 times more sensitive than absorption methods. [True/ False]
Give two examples of systems which shows chemiluminescence.
What is quantum efficiency?
The highest flame temperature is obtained in oxygen with
Mention different parts of flame with the help of schematic diagram.
Section II
Q.2
Describe the X-ray powder diffraction method.
07
Discuss various components encountered in double beam spectrofluoro photometer.
07
Q.3
Discuss applications of refractometry.
07
Give an outline of general techniques used in surface characterization of solids.
07
Q.4
Illustrate different types of burners used in flame photometery.
07
Discuss various excitation sources used in emission spectroscopy.
07
Section III
Q.5
Illustrate different variable affecting refractive measurements.
05
Give the merits and demerits of emission spectroscopy.
05
Give the comparison between fluorescence and phosphorescence.
04
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SLR-VF-185
Q.6
Comment on surface contaminations.
05
Explain the principle and working of Abbe's refractometer.
05
With the help of schematic diagram, explain Bacquerel rotating disc phosphoroscope.
04
Q.7
Write a note on any Three of the following.
14
Limitations of flame photometry
Biochemical applications of phosphorescence
Specific and molecular refractions
Sampling of surfaces