Download GTU BE/B.Tech 2019 Winter 3rd Sem New 2133502 Analytical Techniques Question Paper

Enrolment No.

Subject Code: 2133502

BE - SEMESTER- III (New) EXAMINATION — WINTER 2019

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Subject Name: Analytical Techniques

Date: 30/11/2019

Time: 02:30 PM TO 05:00 PM

Total Marks: 70

Instructions:

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1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

1. Q.1 (a) Explain terms QA & QC. MARKS 03
   (b) Explain various factors affecting Rf value in paper Chromatography MARKS 04
   

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   (c) Discuss theory and instrumentation of HPLC. MARKS 07
2. Q.2 (a) Enlist different types of errors. MARKS 03
   (b) Define the term: TQM MARKS 04
   (c) Explain Lambert Beer’s law of absorption with derivation. MARKS 07
   OR
   

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   Write notes on Chemical shift, shielding, deshielding effect and spin-spin coupling. MARKS 07
3. Q.3 (a) Write a short note on column preparation. MARKS 03
   (b) Write a note on FID used in GC. MARKS 04
   (c) Define the term: co-precipitation and post precipitation. Explain Gravimetric estimation of Ni. MARKS 07
   OR
   

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   Define the term: Stoichiometry MARKS 07
4. Q.4 (a) Write a short note: Nitrogen rule. MARKS 03
   (b) Write a short note on Finger print region. How will you distinguish Ethanol and dimethyl ether using IR spectrum? MARKS 04
   (c) Enlist method of preparation of TLC plates. MARKS 07
5. Q.5 (a) Define various ways of expression of concentration and its importance in analytical techniques MARKS 03
   

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   (b) An organic compound (molecular formula: C₆H₁₂O₂) exhibits the following spectral data:
   IR: 3330 cm^-1(m), 3042 cm^-1(m), 2862 cm^-1(w), 1722 cm^-1(s), 1405 cm^-1
   UV: ?max at 268 nm
   NMR: d 1.1 (6H, singlet), 2.1(3H,singlet), 2.6 (2H,singlet), 3.9 (1H, singlet)
   Deduce the structure of the compound. MARKS 04
   

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   (c) How will you distinguish inter and intra-molecular hydrogen bonding using IR spectroscopy? MARKS 07
   OR
   Explain Spectroscopic behavior of p-hydroxy benzoic acid. MARKS 07
6. Q.6 (a) Analysis of sample gave following values of Cu content: 41.20, 41.33, 41.60, 41.37 and 41.27.Calculate the mean, median, standard deviation, coefficient of variance and range. MARKS 03
   (b) Write the characteristic requisites for a solvent to act as mobile phase. MARKS 04
   

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   (c) Derivertisation is needed in GC - Justify the statement MARKS 07
7. Q.7 (a) What is good laboratory practices? Explain in detail. MARKS 03
   (b) Define the term: Derivertization MARKS 04
   (c) What do you mean by TGA? Explain application of it. MARKS 07
   OR
   

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   What are titrations? Explain EDTA titration in detail with procedure and calculation. MARKS 07

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