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. Q1 Change of free energy with pressure at constant temperature is related
   • a) Volume Volume and entropy
3. Q2 has negative value, then the reaction is
   • a) Non-spontaneous b) Spontaneous c) at equilibrium
4. Q3 Sum of transport number of cations and anions of an electrolyte is
   • a) c)Less than one
5. Q4 Eelectrolytic conductance is due to which of the following
   • a) Electrons Protons
6. Q5 For tetrahedral geometry the radius ratio rule is
7. Q6 Hybridization of in
8. Q7 Number of resonating structures of CO molecule will be
9. Q8 Ifan electron is removed from an antibonding molecular orbital of the species, the bond
   • a) Decreases b) increases remains the same
10. Q9 Phenols can be prepared
11. Q11 An appropriate solvent for Grignard’s reagent formation is
12. Q12 Reaction of Epoxide with HX leads to the formation of
    • B) State whether the following statements are True or False. (03M)
13. Q1 For strong electrolytes degree of dissociation is nearly equal to one
14. Q2 In reaction there is no inversion of configuration
15. Q3 Oxygen molecule is paramagnetic
    • C) Match the following. (05M)
    • i) For spontaneous process a) Octahedral structure
    • v) Sulphation of alcohols e)
16. Q2 Attempt ANY FOUR of the following questions. (20M)
17. Q1 Derive relation between Gibb’s free energy and Helmholtz free energy
18. Q2 Discuss the factors affecting transport number
19. Q4 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
20. Q5 Explain how degree of ionic product of is determined by conductance method
21. Q6 If the equivalent conductance of Dichloroacetic acid at infinite dilution at 250C is 388.5 and the degree of ionization 0.61. Estimate the specific conductivity of 0.1 N
22. Q3 Attempt ANY FOUR of the following questions. (20M) CHEMISTRY P-I S.Y.B.Sc MARKS 100 TIME 3 HRS
23. Q1 What is covalent bond? Explain conditions for the formation of covalent bond
24. Q2 On the basis of molecular orbital theory explain magnetic property and bond order of
25. Q3 Give applications of Born-Haber cycles
26. Q4 Give postulates of valence bond theory
27. Q5 Give difference between sigma and pi molecular orbitals
28. Q6 Calculate the lattice energy of NaC! 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 KJmol", Ionisation potential of sodium = 493.7 KJmol", Electron affinity of chlorine(Cl)= -365.3 Heat of formation of NaCl
29. Q4 Attempt ANY FOUR of the following questions. (20M)
30. Q1 Give factors affecting SN1 and SN2 reactions
31. Q2 With respect to the preparation of alcohols, explain the following reactions
32. Q3 What are Grignard’s reagent? How are they prepared? What is the function of
33. Q4 Explain SN1 reaction with mechanism
34. Q5 Give the ring opening reactions of Epoxides by:
    • i) Hydrolysis in acidic conditions
    • ii) with HX
    • iii) Reaction with ROH
    • iv) Reaction with HCN
    • v) Reaction with RMgX
35. Q6 Write on Williamson’s synthesis
36. Q5 Attempt ANY FOUR of the following questions. (20M)
37. Q1 free energy change for a gaseous reaction is 71.128 KJ. Calculate the equilibrium constant of reaction at 2000K (Given, R = 8.314 Jk-1mol-1)
38. Q2 Explain the factors affecting electrolyte conduction
39. Q3 Explain any five conditions for resonance
40. Q4 Define Hybridization. Explain the hybridization of Be in BeCh
41. Q5 Complete the following reactions iii) iv)
42. Q6 Explain the mechanism of alkaline hydrolysis of tert- butyl bromide giving

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