TYBSc Chemistry Sem 6 Analytical Chemistry Question Paper PDF 2026 - Mumbai University | munotes

Questions asked in this paper

• (2) Figures to the right indicate full marks

1. Q1 Answer any three of the following — 2? 15 marks
   • A. What is the basis of qualitative polarographic analysis? its Significance with the help of neat labelled polarographic
   • B. 5.0 mM solution of ion gave the diffusion of 40 HA at constant temperature. Find the diffusion of Cd(II) Given : rate of flow of mercury = 3.2 mg time
   • C. Explain the w.rt. polarographic
   • (i) Function electrolyte
   • (ii) Need to pass nitkogen gas through experimental solution D: Diffusion current of lead in solution was 5.6 pA 1.0 cm? of 1 x 103 M lead solution was added to 10.0 cm? of the unknown solution and diffusion current increased to 12.2 pA Calculate the concentration lead in the unknown solution
   • E. What are titrations? Explain the nature of amperometric titration eurve when titrand alone is reducible, giving
   • F. Discuss the advantages and limitations of amperometric titrations
2. Q2 Answer any three of the following :— 15 marks
   • A. What is the role of detector in gas chromatography? Describe flame ionisation detector with the help of a labelled diagram D, Explain isocratic and gradient elution in HPLC. Discuss the index detector used in HPLC mentioning its advantage What are ion-exchange resins? What are the requirements of an F: What is ion-exchange chromatography? Discuss the application of ion-exchange chromatography w.r-t
   • (i) seperation of amino acids
   • (ii) deionisation of water three of the ive any three Normal error curve its equation features of this curve
   • B. The following table gives the dependence of y 07 x Assuming a linear relationship between the square analysis of the data to derive an me C What are metal ion indicators? Discuss theory of m
   • D. Two independent methods were used analyse the sample for magnesium content. The results percentage of magnesium The combined deviation was 0.03%. Determine whether two methods or statistically also
   • E. Name the types of EDTA titrations. Explain any two of these types int brief
   • F. What are indicators? Discuss the use of ferroin indicator in the titration of Fe(II) versus Ce(IV) 4, Attempt any three of the following :— is A, do you mean by ISO? Describe ISO 9000 series as total ‘Quality Assurance’. How does it differ from quality Draw a schematic diagram of a mass spectrometer, Explain the role of ion source and ion separator
   • D. Explain the vari
   • E. Discuss the important applications of T Explain the principle underlying
   • (A) Fill in the blanks nt and the
   • (a) The quantitative relation betwee? diffusion given concentration of electroreducible species S
   • (c) The polarisable electrode used in polarography
   • (4) The unit of diffusion coefficient quantitative
   • (A) State true or false :—
   • (p) Migration current is eliminated during analysis with the help of indifferent nic
   • (q) Triton X-100 is used as maxima suppr sor in The magnitude of half wave is independent
   • (s) Since DME surface is renewed, a of reducible species can in the given solution
   • (B) Fill in the blanks a
   • (a) InGC, the band factor caused by random motion of solute ough the column is
   • (b) In GLC, the seperation is based on the of the solute between mobile phase and the liquid stationary
   • (c) In HPLC, the purpose of is to remove impurities solvent in order to prevent contamination of
   • (d) Capacity of ion-exchange resin is measured in terms of
   • (B) Stale true or false 4
   • (p) The temperature of GC column is adjusted slightly above the boiling point of components of the sample
   • (q) In GC, greater the affinity of the solute for the stationary phase, greater will be retention time of the solute in the
   • (r) The exchange capacity of a weakly acidic increases with the seperation
   • C) Fill in the blanks :— Due to low solubility of EDTA in its dihydrate salt is commonly used for
   • (b) An ideal redox indicator should causes a shift of potential of about first
   • (c) In redox titration of v/s irreversibly oxidised to
   • (d) A solution containing and Pb?* for ion at pH 2 using xylenol orange
   • (C) State true or false
   • (p) EDTA reacts with ions in the gatio
   • (q) Formaldehyde is used as a agent in EDTA
   • (r) In the titration of diphenylamine would show a colour. change before the equidence point, in the absence of H,PO,,
   • (s) To see the colour form of redox indicator,
   • (D) Fill in the blanks :— 3
   • (a) The motto control should be no without
   • (b) The curve is a plot of change in the
   • (c) cannot be used for the analysis of elements whose oisotopes have short period
   • (D) State true or false :— The laboratory should 3 is one of provided with air conditioning facihty e requirements for GLP
   • (q) Differential thermal is a type of thermoanalytical for the analysis of cadmium

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