BSc Chemistry SEM II 2016 17 2016-17 Chemistry Paper I R Question Paper - Mumbai University | munotes

Questions asked in this paper

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1. Q2 Answer to the same question must be written together
2. Q3 Figures to the right indicates full marks
3. Q4 The use of log-table/Non-programmable calculator is allowed
4. Q1 (A) Select the correct option (MCQ) and complete the following sentences. 12 marks
   • (i) mole of an ideal gas, the ideal gas equation is
   • (ii) The average kinetic energy of the gas molecule
   • (a) inversely proportional to it’s absolute temperature
   • (b) equal to square of it’s absolute temperature
   • (c) directly proportional to it’s absolute temperature
   • (iii) The entropy of the system increases in the order
   • (iv) Equilibrium constant for.a reaction can be altered by
   • (a) change in concentration of reactant
   • (b) addition of catalyst
   • (c) change in temperature
   • (v) When iron is heated with dil sulphuric acid it evolves
   • (vi) The amount of sample required for semi micro qualitative analysis is about
   • (b) 0.05 g (c) 0.01 g to 0.05 g
   • (vii) among the following, when dissolved in water behaves as a base
   • (viii) The most suitable indicator for the titration between a strong acid and a strong base is
   • (ix) the following alkanes can not be prepared by reduction of alkyne
   • (x) are weakly in nature Reaction intermediate of E1 reaction is
   • (xii) Dehydrating agent for alcohol is
   • Q.P. Code :00003730
   • B) State whether the following statements are true or false. 03
   • (i) Entropy is path function
   • (ii) The conjugate base of H30* is OH
   • C) Match the following columns
5. Q2 (A) (i) State the Boyle’s law and explain the type of deviation from Boyle’s law produced by real gases. 5 marks
   • (ii) Define: the most probable velocity, the average velocity and root mean square velocity. 03
   • (A) (i) Derive Van der Waal’s equation for pressure correction. 05
   • (ii) Explain the term compressibility factor. 03
   • (B) (i) What are Kp and Kc? relationship between relationship between them. 05
   • (ii) For the reaction % S HClig) the standard free energy at 298 K is - Calculate 03 the equilibrium constant for the reaction at the same temperature
   • (B) (i) Define entropy and discuss it’s physical significance. 05
   • (ii) For the reaction 03 The value of 254.8 at 600 K Calculate Kp at 600 K
   • (C) Calculate by using Van der Waal’s equation the pressure exerted by 1.8 mol of NH3 occupying avolume 04
   • (C) (i) Explain irreversible reaction with a suitable example. 02
   • a) Dynamic equilibrium
   • b) reaction
6. Q3 (i) Explain uncommon ion effect. 5 marks
   • (ii). The solubility product of is at Calculate its solubility in pure water. 03
   • (A) Explain the types of qualitative analysis. 05
   • (ii) the importance of solubility product? 03
   • (B) (i) Explain Bronsted-Lowry concept of acids and bases with suitable examples. What are the limitations 05 of this theory?
   • (ii) Write a note on applications of ‘HSAB’ concept in finding the relative stability of complexes. 03
   • Q.P. Code :00003730
   • (B) (i) Explain ‘Solvent system’ concept by taking examples of acetic acid and liquid solvents. What are the advantages of this concept? 03
   • (ii) Write a brief note on ‘Class b’ metals
   • (C) (i) How is complexation phenomenon used for the separation of Fe** ions from Al?* and Zn** ions?
   • (C) (ii) Explain Lewis concept of acids and bases with any two suitable examples
7. Q4 (A) (i) Give the mechanism involved in hydroboration-oxidation of propene. 5 marks
   • (ii) How does acetylene react with the following reagents? 03
   • (A) (i) Explain ozonolysis of alkenes with suitable examples. 05
   • (ii) Give the preparation of propyne from propene. 03
   • (B) (i) Write the mechanism of addition of HBrto propene in presence of peroxide. 05
   • (ii) How will you synthesize ethane from methane? 03
   • (B) (i) What happens when propene is treated with? 05
   • (ii) State and explain saytzeff rule with a suitable example. 03
   • (C) Explain Diels-Alder reaction with suitable example. 04
   • (C) Complete the following reactions (ii) 4
   • (iii) ?
8. Q5 Attempt any four of the following:
   • (A) State and explain Joule-Thomson’s effect. 05
   • (B) Explain Gibb’s free energy and discuss it’s variation with temperature and pressure. 05
   • (C) Give the importance of reagent papers in qualitative analysis and explain the preparation and use of 05
   • Q.P. Code :00003730
   • (D) (i) Name the different types of titrations on the basis of the nature of the reactions. 05
   • (ii) What is ‘Friedel Crafts alkylation reaction’? Write the chemical equation
   • (E) Give the mechanism of chlorination of propane. 05
   • (F) Explain the allylic and benzylic bromination using NBS. 05

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