BSc Chemistry SEM III 2019 2020 Oct 2020 CHEMISTRY PAPER I Question Paper - Mumbai University | munotes

Questions asked in this paper

• ii) Figures to the right indicates full marks

1. Q1 A) Multiple choice Questions. (12M)
2. Q2 If AG has negative value, then the reaction is
   • a) Non-spontaneous b) Spontaneous c) at equilibrium
3. Q3 Sum of transport number of cations and anions of an electrolyte is
   • a) b) c) Less than one
4. Q4 Which of the following factors affects electrolytic
   • a) Nature of b) Inerionic interaction Both
5. Q5 For tetrahedral geometry the radius ratio rule is
6. Q6 Hybridization of ‘Be’ in is
7. Q7 Number of resonating structures of CO molecule will be
8. Q8 Ifan electron is removed from an antibonding molecular orbital of the species, the bond
   • a) Decreases b) remains the same
9. Q9 Phenois can be prepared
10. Q10 Epoxides are named CHEMISTRY P-I S.Y.B.Sc MARKS 100 TIME 3 HRS
11. Q11 An appropriate solvent for Grignard’s reagent formation is
12. Q12 Reaction of Epoxide with HX leads to the formation of
    • B) Match the following. (05M)
    • v) Sulphation of alcohols e) Va
    • C) State whether the following statements are True or False. (03M)
13. Q1 For strong electrolytes degree of dissociation is ncarly equal to one
14. Q2 Bond order in O2 molecule is 2 marks
15. Q3 SN! reactions are favored by less polar solvents
16. Q2 Attempt ANY FOUR of the following questions. (20M)
17. Q3 free energy change for a gaseous reaction is 71.128 KJ. Calculate the equilibrium constant of reaction at 2000K (Given, R = 8.314
18. Q4 Explain the factors affecting electrolyte conduction
19. Q5 Explain how degree of ionization is determined by conductance method
20. Q6 If the equivalent conductance of Dichloroacetic acid at infinite dilution at is 388.5 Scm? and the degree of ionization 0.61. Estimate the specific conductivity of 0.1 N CHEMISTRY P-I S.Y.B.Sc SEM-III MARKS 100 TIME 3 H
21. Q3 Attempt ANY FOUR of the following questions. (20M)
22. Q1 What is ionic bond? Explain any two conditions for the formation of ionic bond
23. Q2 Explain any five conditions for
24. Q3 On the basis of molecular orbital theory explain magnetic property and bond order of
25. Q4 Give applications of Born-Haber cycles
26. Q5 Give postulates of valence bond theory
27. Q6 Give difference between sigma and pi molecular orbitals
28. Q4 Attempt ANY FOUR of the following questions. (20M)
29. Q1 Write 4 note on claisen rearrangement of allyloxy arenes
30. Q2 With respect to the preparation of alcohols, explain the following reactions
31. Q3 Explain the mechanism of alkaline hydrolysis of tert- butyl bromide giving
32. Q4 Explain SN' reaction with mechanism
33. Q5 Give the ring opening reactions of Epoxides by:
    • i) Hydrolysis in acidic conditions
    • ii) Reaction with HX
    • iii) Reaction with ROH
    • iv) Reaction with HCN
    • v) Reaction with RMgX
34. Q6 Give applications of phenols
35. Q5 Attempt ANY FOUR of the following questions. (20M)
36. Q1 Discuss the factors affecting transport number CHEMISTRY P-I SEM-III MARKS 100 TIME 3 HRS
37. Q2 22.6 g of an aqueous solution of ethanol contains 4.6 g of ethanol. If change of chemical potential of ethanol is -10 KJ. Find the change of chemical potential for
38. Q3 Calculate the lattice energy of NaCl crystal from the following data by the use of Born-Haber Cycle. Heat of atomization of Sodium = 108.7 KJmol-1, . Heat of atomization of chlorine = 120.9 Ionisation potential of sodium = 493.7 KJmol", Electron affinity of chlorine(Cl)= -365.3 KJmol", Heat of formation of NaCl
39. Q4 Define Hybridization. Explain the hybridization of Be in BeCl
40. Q5 What are Grignard’s reagent? How are they prepared? What is the
41. Q6 Complete the following reactions
    • ivi) Ethey

Read from the scan above, so a character or two may differ. The scan is the original.