SET:1
1. What are the instrumental methods? How are they classified? Name two or three instrumental methods for each of the physical property.
2. (a) Write briefly about origin and theory of UV spectroscopy
(b) What are the various components of UV spectrophotometer and discuss each of them in detail and briefly the scanning of UV spectrophotometer?
3. Write short notes on the following UV applications:
(a) Quantitative analysis
(b) Molecular weight determination.
(c) Impurities in organic compounds.
4. (a) What are the advantages in atomic absorption of a heated graphite atomiser over a flame atomiser.
(b) Why are spectral interferences less severe in atomic amsorption and atomic flourescence spectroscopy than in flame emission spectroscopy?
(c) What is the purpose of densitometer and how is it used in qiantitative determination.
5. Explain the analytical applications of emission spectroscopy with examples.
6. Comment on:
(a) Relaxation time
(b) Magic number
(c) Tetramethyl silane and its significance
(d) Multiplicity in NMR
7. Discuss ESR instrumentation with a block diagram.
8. Out of syllabus(so not mentioned!)
SET: 2
1. (a) Distinguish between accuracy and precision.
(b) What are determinate and indeterminate errors
(c) Write briefly about determinate and indeterminate errors.
(d) Distinguish between relative and absolute error.
2. (a) What are different regions of infra red radiation? Explain various types of stretching and bending vibrations with suitable examples.
(b) What is force constant? How is it determined? To what use is it put?
3. (a) What is the difference between molar absorptivity and absorbance?
(b) An absorbance of 0.436 was obtained after 11.5 ml of titrating agibt was added to 68ml of an initial solution. What was the corrected absorbance of the solution? What would be the % error have been if the correction was not made?
(c) A water solution of a coloured compound has a molar absorptivity of 3200 at 525nm. Calculate the absorcance and % transmittance of a3.40 * 10-4 solution if a 1.0 cm
4. (a) Write the advantages of atomic absorption spectroscopy over flame emission spectroscopy?
(b) What is a single beam and a double beam atomic absorption spectrophotometer and explain the instrumentation involved?
(c) Define sensitivity and detection limits in atomic absorption spectroscopy.
5. (a) Explain the function of a monochromater.
(b) How plasma emission is used for analytical purpose?
6. Write short notes on
(a) Longitudinal relaxation
(b) Transverse relaxation
(c) Spin-Spin coupling.
7. Out of syllabus
8. Out of syllabus
SET: 3
1.
(a) Define sensitivity and detection limits
(b) Give the detection limits of
1. IR Spectrometry
2. UV Spectrometry
3. NMR
4. Mass Spectrometry
(c) What are the advantages and disadvantages of chemical and instrumental methods.
2. Write short notes on:
(a) Molar extinction coefficient
(b) Laws of absorption
(c) Photometric titrations
(d) Photometric accuracy
3. Write short notes on the following UV applications:
(a) Chemicals kinetics
(b) Charge transfer transitions
(c) Dissociations constants of acids and bases
4. Write short notes on:
(a) Total consumption burner
(b) Premix burner
(c) Nebulizers
5. (a) Explain how the output is detected.
(b) Explain how two lines are separated.
6. (a) What is spin-spin splitting?
(b) A methylene group (CH2) is adjacent to a CH group. Into how many peaks is the CH2
peak split by the single adjacent hydrogen?
7, 8 out of syllabus.
1. Repeat (set 2 - Q1)
2. (a) why far U.V region is called vacuum ultra region
(b) discuss the advantages and disadvantages of spectrophotometry in vacuum-ultra violet region of the spectrum.
(c) why are the absorption bands appear instead of sharp lines in UV spectra
3. Repeat (set1 – Q3)
4. (a) in atomic absorption, the elements such as Al, Ti, Mo, V, Si can not be detected when a flame is used to produce the atomic state. Why?
5. Explain the analytical applications of emission spectroscopy with examples
6. Draw a schematic of an NMR instrument and discuss the parts.
7. Out of syllabus
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