BSc Biochemistry Sem II ATKT CHEMISTRY PAPER I Question Paper - Mumbai University | munotes

Questions asked in this paper

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1. Q2 Answers to the sub-questions must be written together
2. Q3 Figures to the right indicate marks
3. Q4 The use of log table/non programmable calculator is allowed
4. Q1 (A) Select the correct option and complete the following sentences : 12 marks
   • i) The gas will show heating effect
   • a) at inversion temperature
   • ii) When a real gas is allowed to expand adiabatically then its temperature
   • a) decreases
   • b) increases
   • c) remain constant
   • iii) According to Le-chatlier principle, the ideal condition for the reaction
   • iv) On dissolving KC] in water there is "Ry
   • a) increase in free energy
   • b). decrease in entropy increase in entropy
   • v) For the precipitation of sulphides of Co**, group reagents are
   • vi) In a chemical test heating solid substances alone or with other substances then the
   • a) wet test
   • b) dry test
   • vii) Acidic & basic character in non-aqueous solvent is not explained by
   • a) Arrhenius concept
   • c) Lewis-concept
   • Q.P. Code : 51462 among the following is Lewis base
   • ix) Coupling of alkylhalide with ether to form corresponding hydrocation is called as Wurtz reactions
   • b) Na
   • x) If two atoms or groups are eliminated from adjacent carbon atoms then it is called
   • xi) The C-X & C-H bonds may breaks simultaneously then such mechanism is
   • b) Ex
   • xii) The product of Hofmann elimination reaction is olefin
   • a) least alkylated
   • b) most alkylated
   • c) least hydrogenated
5. Q1 (B) State whether the following statements are True or False : 3 marks
   • i) Non ideal gases behave ideally at high pressure & low temperature
   • ii) Lux-flood concept explains acid-base behaviour in terms of ‘Oxide ili) Wilkinson catalyst is the common name for chloro tris (triphenylphosphine)
6. Q1 (C) Match the following columns : 5 marks
   • ii) Active mass of solid n) (8RT/nm)”
   • r) propyl bromide
7. Q2 (A) i) Discuss the Van der Waals modification of the ideal gas equation PV = nRT by replacing the pressure with corrected pressure 5 marks
   • ii) Distinguish between real and ideal gases. 03
   • Q.P. Code : 51462
8. Q2 (A) i) Explain compressibility factor. Calculate the volume occupied by 8 moles of a gas at 1-013 x 10’ N/m’ pressure and 275K, if its compressibility factor is 0-783 5 marks
   • ii) State and explain Charles law. 03
9. Q2 (B) i) reversible and irreversible reactions? Explain with suitable examples. 5 marks
   • ii) Equillibrium constant for the reaction A = B at 298K is 2 x Calculate the 03 standard free energy change for the reaction. (R = 8-314 J/k/mol)
10. Q2 (B) i) Define entropy. Give the physical significance of entropy. 5 marks
    • ii) The equilibrium constant of a reaction is at and at What is 03 the nature of the reaction, exothermic or endothermic? Give reasons
11. Q2 (C) State any four assumptions of kinetic theory of gases. 4 marks
12. Q2 (C) State any four characteristics of equilibrium constant of a reaction. 4 marks
13. Q3 (A) 1) Explain the solubility product principle used in qualitative analysis with example. 5 marks
    • ii) Calculate the solubility of silver chromate if concentration of silver ion is 03 2:6x10* mol/dm? & chromate ion is 1-3 x mol/dm?
14. Q3 (A) i) What are the apparatus used to detect the gases in qualitative analysis. 5 marks
    • ii) Give the classification of gases. 03
15. Q3 (B) i) Explain Pearson’s Principle of acids and bases. Comment on stability of complex and occurrence of mineral of MgCO3 and CaCOs 5 marks
    • ii) Give limitations of Arrhenius acid-base concept. 03
16. Q3 (B) i) Lewis concept of acids and bases? Give its advantages. 5 marks
    • ii) Define equivalence point. 03 Calculate the pH of solution When of KOH is added to 10-0 cm? of 0- 1M HCI
17. Q3 (C) Write a brief note on hydrogen sulphide gas. 4 marks
18. Q3 (C) Explain the solvent solute system (Autoionization) concept with suitable examples. 4 marks
19. Q4 How is sodium acetylide prepared? How is it converted into following: Explain oxidation of 2-Butene with with chemical equation. Why it is called a 04 syn-addition? Explain its stereospecificity 4 marks
20. Q4 (A) i) Explain Diels Alder Reaction with one example. Name diene and dienophile. Give 4 marks
    • ii) What are different types of catalysis? Explain with examples. Explain why catalytic 04 hydrogenation of olefin is predominantly cis-addition
    • Q.P. Code : 51462
21. Q4 (B) i) Explain Allylic and Benzylic bromination with suitable examples. 4 marks
    • ii) State and explain Markownikoff’s and Anti Markownikoff’s rules with examples
22. Q4 (B) 1) What is ozonolysis? Give the products of ozonolysis of ethene and 4 marks
    • ii) Write a note on E; mechanism with rate and order of reaction. 04
23. Q4 (C) State and explain with suitable examples 4 marks
    • i) Saytzeff rule
24. Q4 (C) Define vicinal dihalide. How is it converted into following alkynes: 4 marks
25. Q1 Acetylene
    • ii) Propyne
26. Q5 Answer any four of the following :
    • A) Explain the causes of deviation of gases from the ideal behaviour. 05
    • B) For the reaction = Calculate the value of & Kp at The 05 equilibrium concentration of H2@), & are 0-09 mole 0-03 mol
    • C) Explain the effect of complexation in separation of ions. (Any two examples). 05
    • D) Differentiate between Bronsted & Lewis concept of acids & bases with suitable example. 05
    • E) Explain oxymercuration & demercuration reaction and give its mechanism and one 05
    • F) What are the different products obtained when 1,3 butadiene is treated with Br2 & HCl. 05

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