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

Questions asked in this paper

1. Q1 All questions are compulsory
2. Q2 Figures to the right indicate full marks Use of logtables/non-programmable calculator is allowed 1, Answer any three of the following: | 15
   • A) Give the sourcewise classification of determinate errors. Explain each class with suitable examples
   • B) In replicate analysis of Ni alloy, the following results were obtained
   • C) Explain the method of collecting representative sample of flowing liquid with a neat labelled diagram
   • D) determinatin of calcium from sample containing 400 mg of calcium by a method, following results were obtained Find i) absolute error ii) relative error relative error in ppt
   • E) the terms ‘sample’. Explain the use of coning and quartering method in the sampling of solids
   • F) Discuss the use of sample thief in the sampling of heterogeneous liquids,
3. Q4 any three of the following? 15 marks
   • A) Discuss the nature of titration curve in the titration of weak acid versus strong base, explaining the choice of indicators Discuss the Mohr’s method of determining the end point in argentimetric titrations. Explain its limitations
   • C) the nature of titration curve in the titration of strong acid versus strong base, justifying the suitable indicators
   • D) between spectrophotometers and colorimeters
   • E) schematic diagram of single beam spectrophotometer and give the function of its components
   • F) the use of adsorption in indicators in precipitation titrations with suitable example ematic sampling, sample units are drawn, in a definite quence at equal intervals from one another
4. Q8 deviation ‘s’ of the percentage impurity due to sampling
5. Q5 8B) in the blanks. ) Bromocresol green can be used as preferred indicator in the titration of weak base against acid 4 In the titration of weak acid against weak base, pH before the q a equivalence point can be calculated by equation, 4 marks
   • c) In Volhar d’s method, is used as a coagulant to prevent the reaction between thiocyanate and AgCl
   • d) Calibration curve is a plot of versus concentration in UV - visible spectroscopy
   • B. State true or 04
   • p) It is advisable to avoid the use of simple indicators to detect the equivalence point in weak acid-weak base titration
   • q) Volhard’s method for the determination of halides is a direct
   • r) In UV - visible spectroscopy, multiplication factor can be used to determine the concentration of the solution Unsaturated organic compounds absorb in the visible region Fill in the blanks
   • a) Bush-Densen equation is given by = q = 0.01 ina given solvent extraction, then D,,,, =
   • c) values can be used to identify the components of an adsorbent coated ona glass In solvent extraction, role of solvent 1s to neutralise the charge of the metal ion The phosp ce of true or false,

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