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

Questions asked in this paper

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1. Q2 Answers to the same questions must be written together
2. Q3 Figures to the right indicate full marks
3. Q4 The use of log table/ non programmable calculator is allowed
4. Q1 (A) Select the correct option and complete the following statements(Any twelve) 12 marks
5. Q1 The rate law of the reaction, A + B Product is given by d[Product]/dt = The order of the reaction will of rate constant of a first order reaction lii) For a single step reaction 2A + B ——> Products, the Iv) The rate of evaporation of a liquid depends upon
   • a) surface area b) nature of liquid c) both a and b
   • v) Insects can walk on the surface of water due to
   • vi) The SI unit of coefficient of viscosity is Vil) In the interhalogen compound IF; oxidation state of Iodine is vili) In diamond, carbon atoms have undergone
   • ix) The chemical formula of quick
   • x) Among the following, _ _ 1s a diagonal pair X1) The tendency of elements to form a long chain of same atoms
   • xiii) The presence of in a molecule results in formation of isomers differ in physical properties
   • a) Enantiomers b) c)d & | isomers XV) According to Caln Ingold Prelog system 1s the least
   • xvi) due to internal compensation Xvii) The main condition for optical activity
   • (B) State whether the following statements are True or False 3
6. Q1 Increasing the temperature of a reaction will increase the rate li) Fluidity is reciprocal of. viscosity Due to inert pair effect in group 14 from carbon to lead, stability of +4 oxidation state decreases
   • iv) As the ionization energy increases the metallic character also
   • v) Staggered conformation is the most stable conformation Vi) Specific rotation is denoted by the symbol
   • (C) Match the following columns(Any Five) step in a reaction crystals plane of paper 5
   • (vi) | Vertical lines in
7. Q2 Attempt any Four of the following
   • (A) Derive an expression for the rate constant of a first order 5
   • (B) Define rate constant of a reaction .Explain pseudo first order reaction with an example 5
   • (C) second order reaction involving reactants of equal concentration initially present is 0.2mol/litre. It was found to be 40% completed in 50 minutes. Calculate 5
8. Q1 the rate constant
   • (D) Define viscosity of liquid? Explain, how is it measured 5
   • (E) At 293K, water formed 29 drops when flowing through the capillary of a stalagmometer, while an equal volume of ether formed 86 drops. If the densities of water and ether are 0.997 g cm? and 0.70 g respectively. Find the surface tension of ether, if that of water is 72.8 x N/m 5
   • (F) Define Liquid Crystals? How are the liquid crystals classified? 5
9. Q3 Attempt any Four of the following
   • (A) Discuss the oxidation states of group 15 and group 16 with respect to inert pair effect 5
   • (B) Summarize the characteristics of nitrides of alkaline 5
   • (C) Discuss the sources of emission of sulphur dioxide in the atmosphere and the technique employed to control the emission 5
   • (D) Justify, the anomalous behaviour of lithium. 5
   • (E) Write the following with respect to calcium carbonate 5
10. Q1 any one method of preparation li, any two properties ili. any two uses
    • (F) Write a note on photochemical smog. 5
11. Q4 Attempt any Four of the following
    • (A) Assign the configuration ‘R’ or ‘S’ Chirality of molecules. (1) 4
    • (B) 1) chiral and achiral molecules. li) Assign ‘D’ or ‘L’ configuration to the following compounds (2) 3
    • (C) meant by racemic mixture? What is resolution of il) What are enantiomers? Give suitable examples. (2) 3
    • (D) i) Explain geometrical isomerism in cycloalkanes with examples. 3
    • ii) Name the isomers as 'Z’ or ‘E’ Identify the pair of diastereoisomers from the following. (3) 2
    • ii) Draw the Sawhorse projection formulae of mesotartaric acid 2
    • (F) Convert the following Fischer projection formulae to Newmann
    • ii) | Name the isomers as ‘erythro’ and ‘threo’. 2
12. Q5 Attempt any Four of the following
    • (A) Define half life time of a reaction. Explain the half life time method for the determination of order of reaction 5
    • (B) Define 5
13. Q1 Coefficient of Viscosity
    • (C) Describe metallic and nonmetellic character of main group 5
    • (D) What are carbides? Explain the characteristics of any two types of ionic carbides 5
    • (E) 1) Explain briefly what is meant by diastereoisomers 1i) Identify cis and trans isomer for the following (2) 3
    • (F) What is conformation? Draw the conformation of n-butane by rotation of C2— C3 bond, 5

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