BSc Sem IV 2022 2023 Mar 2023 CHEMISTRY P III Question Paper - Mumbai University | munotes

Questions asked in this paper

• ii) Figures to the right indicate full marks

1. Q2 The giass electrode is ---------------------electrode
   • a) Indicator b) Reference d) None of them
2. Q3 Which is a measure of dispersion of data?
3. Q4 The most frequently obtained observation from the given set is knownas
4. Q5 Which of the following is not a type of gas-solid separation
5. Q6 A-------------is that electrode whose potential is known and remain constant
6. Q7 The unit.of cell
7. Q8 The Variance is given as
8. Q9 The doubtful valuc in a given measurements is rejected or retained
9. Q10 The range of normal distribution is:
   • a) Oton b) 0 to+] d) -09 to +00
10. Q11 In combined glass electrode, the reference electrode used is-----------------electrode
    • a) saturated calomel glass electrode _c) saturated hydrogen d) none of them
11. Q12 Which part of the cell is responsible for movement of current between two solutions?
12. Q13 Electrophoresis is a electrolysis of the solution
13. Q14 lodine chamber is used for
    • a) Detection in TLC b) determination in TLC c) detection in paper chromatography
    • d) determination in paper chromatography
14. Q15 Which technique is used to measure EMF? Convert electrical energy into chemical energy with the non / CHEMISTRY B.Se. SEM-IV MARKS 100 TIME 3HRS
15. Q17 In electrolytic cell anode and cathode have-------- and --------- charge
    • a) positive and negative b) positive and positive c) negative and positive d) negative and
16. Q18 The electrode at which reaction takes place is called as-----------?
    • B. Match the following. 5
17. Q2 Unit of conductance b. Random error
18. Q4 Separation of miscible liquids d. Measure of central tendency
19. Q5 Separation of metal ion e. Siemen
    • C. Write true or false
20. Q1 Spectrophotometers are more sensitive chan calorimeter
21. Q2 Potentiometeric titration method is applicable to only aqueous solution
22. Q3 The mechanism of separation in paper chromatography is partition
23. Q2 Attempt any four:
    • a) Define :- Precipitation, Filtration, Crystallisation, Azotropic distillation and Extractive
    • b) What do you understand by the term Separation factor as applied in solvent extraction?
    • c) Describe batch Extraction in solvent extraction?
    • d) Give a brief description of Thin layer Chromatography
    • e) Write application of Paper Chromatography in separation of cations
    • f) What are the Principles of paper chromatography” How are the components of a mixture identified in paper chromatography? What is meant by R f value?
24. Q3 Attempt any four:
    • a) Give advantages and disadvantages of conductometric titration
    • b) Describe principle and working of glass electrode
    • c) Explain principle of PH metry
    • d) Explain basic principle of Potentiometric titration on the basis of Nernst equation
    • e) Describe the graph of Conductometric titration for : i) strong acid Vs strong
    • f) Explain basic principle of Conductometric titration? Give the construction of conductivity cell with neat and diagram
25. Q4 Attempt any four:
    • a) Explain the different ways for minimization of errors
    • b) Define the following terms: deviation, relative average deviation, range, standard deviation and variance
    • c) (i) Explain the terms mean, mode, median
    • (ii) Calculate the mean and the median fox the following set of values 18.30. 18.28, 18.32, 18.27 and 18.28 VCD CHEMISTRY P-III S.Y. B.Sc. SEM-IV MARKS 100 TIME 3HRS
    • d) The hardness of water samples was determined with the following observations in ppm Calculate the standard deviation, variance, relative standard deviation and coefficient of
    • e) Write a short note on null hypothesis
    • f) Explain the Q- test
26. Q5 Attempt any four: "% a) Write short note on (i) Electrophoresis (ii) Steam Distillation
    • b) Give applications of Thin layer Chromatography
    • c) Write a short note on primary reference electrode and secondary reference electrode
    • d) What are the different types of pH meters? What is the use of pH metry in bioiogical and environment at analysis?
    • e) Describe the Gaussian distribution curve with its salient features
    • f) In the analysis of sulphur content of a sample, the following values were reported Sulphur content (percent): 0.47, 0.48, 0.47 and 0.50 The valne 0.50 appears doubtful. This value is therefore provisionally discarded

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