Download OU B.Sc 2018 Dec 3rd Year 3169 Instrumental Method of Analysis Question Paper

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Code No. 3160/E

Subject : Chemistry

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Paper - VI (A) : Instrumental Methods of Analysis (DSE)

Time : 3 Hours

Max. Marks: 60

PART - A (5x3=15 Marks)

1. What is meant by retention factor (R_f) value? Write the factors affecting R_f value.
2. What is meant by Ion-exchange chromatography? Name any two Cation and Anion exchangers.

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3. Write the advantages of gas chromatography.
4. Define the following terms:
   1. Transmittance
   2. Absorbance
5. Mention the Lamps used as energy sources in spectrophotometry.

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6. Explain Normal hydrogen electrode.
7. Define the terms (a) over potential (b) polarization

PART - B (4x11=44 Marks)

(Essay Type)

Note: Answer all questions.

9. (a) (i) Discuss counter current extraction method (5)
   

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   (ii) Explain about ascending and descending methods of development of chromatograms in Paper chromatography. (6)

   OR

   (b) (i) How do you determine Iron (II) by solvent extraction technique? (5)
   (ii) What is two dimensional chromatography? Write its applications. (6)
10. (a) (i) Discuss the selection criteria of mobile phase solvents for electing polar, non-polar compounds in column chromatography. (5)
    (ii) Discuss the principle and Instrumentation of HPLC. (6)

    OR

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    (b) (i) Draw the block diagram of Gas chromatography. (5.5)
    (ii) Discuss the applications of Gas liquid chromatography. (5.5)
11. (a) (i) Explain single beam UV-visible spectrophotometry with block diagram. (5)
    (ii) Explain estimation of Iron in water samples by thiocyanate. (6)

    OR

    (b) (i) Draw the block diagram of FT-IR spectrophotometer. (5)
    

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    (ii) Explain the estimation of chromium in steel by UV-visible spectrophotometry. (6)

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