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

Questions asked in this paper

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• 2. Figures to the right indicate full marks

1. Q3 Use of log-table/non-programmable calculator is allowed
2. Q4 Answers for the same question as far as possible should be written together
3. Q1 Attempt any three of the following :
   • (A) Explain the terms residual current, diffusion current, limiting current and half wave 5 potential with respect to a polarographic wave
   • (B) How is the equivalence point located in potentiometric titrations? 5
   • (C) Describe the rotating platinum electrode. State its advantages. 5
   • (D) Explain various types of amperometric titrations with suitable examples. 5
   • (E) Diffusion current for Cadmium ions in an unknown solution was found to be When | cm? of 1 X 107? M solution of Cadmium ions was added to 25 cm? of the sample solution, the current increased to 40 wA. Calculate the concentration of Cadmium ions in the sample solution
   • (F) An organic substance was reduced 5 gave a diffusion current of 24.0 wA, with a mercury flow rate of 3.2 anda drop time of 2.8 s. If the diffusion coefficient of the compound is1 x calculate the number of electrons transferred in the reduction reaction
4. Q2 Attempt any three of the following :
   • (A) What are food preservatives? Classify modern methods of food preservation. 5
   • (B) Describe Lane-Eynon method of estimation of lactose in milk. 5
   • (C) Give an account of the composition of honey. Compare the physicochemical 5 parameters of ripened and unripened honey
   • (D) How is caffeine estimated in coffee? 5
   • (E) What are cosmetics? Explain its functions. 5
   • (F) Explain the method for estimation of chloride in a deodorant sample. 5
5. Q3 Attempt any three of the following :
   • (A) Draw diagram of a gas chromatograph and describe the functions of 5 any three of its components
   • (B) Give important applications of gas chromatography. 5
   • (C) Substance A and B have retention times 16.40 and 17.63 min. respectively, on a 5 287mm column. An unretained species passed through the column in 1.30 minutes The peak width at the base for A and B were 1.11 and Calculate; the average number of plates in the column and plate height
   • (D) What is a cation exchanger? How capacity of anion-exchange resin is determined? 5
   • (E) Explain the following applications of ion exchange chromatography- 5
   • (a) Separation of lanthanides and
   • (b) Preparation of exact concentration of acid and base
   • (F) Give applications of size exclusion chromatography. 5 4, Attempt any three of the following :
   • (A) What is TGA? Describe the components of thermo balance. 5
   • (B) What are the factors which influence the TG Curve? Explain thermal 5
   • (C) What is the principle of DTA? Explain DTA Curves of 5
   • (D) What is thermometric titration? Explain its basic principle. 5
   • (E) Explain the principle and theory of Neutron Activation Analysis. 5
   • (F) How will you classify Radio-Analytical Techniques? 5
6. Q5 (A) Fill in the blanks 4 marks
   • (a) used in polarography as a electrolyte
   • (b) <A graph of vs. volume of titrant is plotted in potentiometric
   • (c) Ilkovic equation forms the basis of analysis in polarography
   • (d) - is plotted on Y axis in amperometric titrations
   • (A) State true or false 4
   • (p) Half wave potential is half of diffusion current
   • (q) Triton X 100 is used as a maxima suppressor
   • (r) Quinhydrone electrode is used reference electrode in potentiometric
   • (s) . Amperometric titrations can be carried out at more negative potentials than
7. Q5 (B) in the blanks 4 marks
   • (a) is.a physical method of food preservation
   • (b) Teais made from the leaves of the shrub called
   • (c) is the ability to impart a velvety finish to the skin in face powders
   • (d) like used predominantly in lipsticks
   • (B) State true or false 4
   • (p) Sulphur dioxide is used as a preservative for fruits and vegetables
   • (q) Milk contains high percentage of Vitamin C
   • (r) LTLT method involves heating milk to for at least 15 sec
   • (s) The main ingredient in face powder is calcium carbonate
8. Q5 Fill in the blanks 4 marks
   • (a) gas chromatography when stationary phase is solid adsorbent, the technique is called as
   • (b) The contribution from the non equal paths of the molecules of the solute leading to the broadening of the peak is known as
   • (c) of the resin should be than that of water
   • (d) exclusion chromatography separation of the solute is based on
   • (C) State true or false 4
   • (p) of mass of the component versus carrier gas velocity (u), is known as
   • (q) resolution can be improved by changing the temperature
   • (r) Capacity of an ion-exchange resin is expressed as milliequivalent per gram of dry resin
   • (s) Isomers can be separated from one another using size exclusion
9. Q5 Fill in the blanks 3 marks
   • (a) specimens are analysed by technique
   • (b) Furnace Temperature Programmer consists of thermocouple made up of
   • (c) Radioactive product per second is
   • (D) State true or false 3
   • (p) The function of atmosphere control is to remove the gaseous products
   • (q) flat plate shaped crucible is preferred because of easy diffusion of evolved
   • (r) thermometric titration graph of Boric Acid against NaOH shows two

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