Loyola College Question Paper 2009

Loyola College B.Sc. Mathematics April 2009 Alg.,Anal.Geomet. Cal. & Trign. – I Question Paper PDF Download

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

   B.Sc. DEGREE EXAMINATION – MATHEMATICS

FIRST SEMESTER – NOVEMBER 2010

    MT 1500 – ALG.,ANAL.GEOMET. CAL. & TRIGN. – I

 

 

 

Date : 10-11-10                     Dept. No.                                                 Max. : 100 Marks

Time : 1:00 – 4:00

 

PART – A

Answer ALL the questions.                                                                                                (10 x 2 = 20)

 

  1. Find yn when
  2. Show that, in the parabola y2=4ax,  the subtangent at any point is double the abscissa.
  3. Find the radius of curvature of xy=30 at the point (3,10).
  4. Define evolutes.
  5. Form equation given that 3+2c is a root.
  6. If α,β,γ, are the roots of the equation x3+px2+qx+r=0 find the value of ∑α2.
  7. Evaluate
  8. Prove that cosh =
  9. Find the polar of the point (3,4) with respect the parabola y2=4ax.
  10. Define conormal and concyclic points.

 

PART  –  B

 

Answer any FIVE questions.                                                                                               (5 x 8 = 40)

 

  1. Show that in the curve hy2=(x+a)3 the square of the subtangent varies as the subnormal.
  2. Find the radius of curvature at the point ‘t’ of the curve

x=a(cost+tsint); y=a(sint-tcost).

  1. Find the coordinates of the centre of curvature at given point on the curve y=x2;
  2. Solve the equation x4+2x3-5x2+6x+2=0 given that 1+is a root of it.
  3. Find the real root of the equation x3+6x-2=0 using Horner’s method.
  4. Expand sin3θ cos4θ in terms of sines of multiples of θ.
  5. If sin(θ+iφ) =tanα + isecα , prove that cos2 θ cosh2φ =3.
  6. Show that the area of the triangle formed by the two asymptotes of the rectangular hyperbola xy=c2 and the normal at (x1,y1) on the hyperbola is .

PART – C

Answer any TWO questions.                                                                                            (2 x 20 = 40)

 

  1. a) Prove that if y=sin(msin-1x), then (1-x2)y2-xy1+m2y=0.
  2. b) Show that the evolute of the cycloid x=a(θ – sinθ);y=a(1-cosθ) is another cycloid.

 

  1. a) solve 2x6-9x5+10x4-3x3+10x2-9x+2=0.
  2. b) If α is a root of the equation x3+x2-2x-1=0 show that α2 -2 is also a root.

 

  1. a) if u=log tan show that tanh   = tan  and θ = -i log tan
  2. b) sum to infinity the series
  3. a) Find the locus of mid points of normal chords to the ellipse
  4. b) Find the polar of the point (x1, y1) with respect to the parabola y2=4ax.

 

­­­­­­­­­

 

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Loyola College B.Sc. Computer Science April 2009 Software Engineering Question Paper PDF Download

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

SH 17

B.Sc. DEGREE EXAMINATION – COMPUTER SCIENCE

FIFTH SEMESTER – April 2009

CS 5505 – SOFTWARE ENGINEERING

 

 

 

Date & Time: 17/04/2009 / 9:00 – 12:00     Dept. No.                                                       Max. : 100 Marks

 

 

SECTION – A

Answer ALL the questions                                                                          (10 x 2 = 20 marks)

  1. What is Software Engineering?
  2. What are Software metrics?
  3. What do you mean by SQA?
  4. What is SCM?
  5. Write the difference between ‘Known Risks and Predictable Risks”
  6. What is Software Prototyping?
  7. Define Modularity.
  8. Define Cardinality
  9. Define Cohesion
  10. What is Regression Testing?

SECTION – B

 

Answer ALL the questions                                                                    (5 x 8 = 40 marks)

  1. a) Explain about Linear sequential.

(or)

  1. b) Explain the various Software myths.
  2. a) Write short notes on Software Configuration Management.

(or)

  1. b) Explain about Requirement analysis techniques
  2. a) What is DFD? Explain with a suitable example.

(or)

  1. b) Explain about Jackson System Development model.
  2. a) Explain about the various design principles.

(or)

  1. b) Write short notes Effective Modular design.
  2. a) Explain about the Software Testing Principles

(or)

  1. b) Explain about the McCall’s Quality Factors.

 

SECTION – C

 

Answer any TWO questions                                                                        (2 x 20 = 40 marks)

 

  1. a) Explain in detail about Software Engineering Paradigm.
  2. b) Discuss in detail about Risk Managment.
  3. a) What is Analysis modeling? Explain the elements of analysis model in detail.
  4. b) Discuss in detail about DSSD.
  5. a) Explain in detail about Black box Testing Techniques.
  6. b) Explain the following concept (i) Size oriented Metrics (ii) Function Oriented Metrics

 

 

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Loyola College B.Sc. Computer Science April 2009 Software Engineering Question Paper PDF Download

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     LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – COMPUTER SCIENCE

SH 13

FIFTH SEMESTER – April 2009

CS 5502 – SOFTWARE ENGINEERING

 

 

 

Date & Time: 17/04/2009 / 9:00 – 12:00     Dept. No.                                                       Max. : 100 Marks

 

 

SECTION –A

ANSWER ALL THE QUESTIONS                                    (10 x 2 = 20)               

 

  1. What is Software Engineering?
  2. What are Software Metrics?
  3. What do you mean by SQA?
  4. What is SCM?
  5. Write the difference between ‘Known Risks and Predictable Risks”
  6. What is Software Prototyping?
  7. Define Modularity
  8. Define Cardinality
  9. Define Cohesion

10.What is Regression Testing?

                                                           SECTION –B

ANSWER ALL THE QUESTIONS:                                        (5 x 8 = 40)

 

  1. a) Discuss about Linear sequential. Model

(Or)

      b) Explain various Software myths

  1. a) Discuss in detail about Software Configuration Management

(Or)

       b) Explain briefly about Requirment  analysis techniques

  1. a) What is DFD?Explain with a suitable example

(Or)

  1. b) Describe Jackson System Develpomemt model
  2. a) Discuss Design principles in detail

(Or)

        b) Discuss about Effective Modular design

  1. a) Explain briefly the Software Testing Principles

(Or)

  1. b) Discuss about McCall’s Quality Factors.

                                                             SECTION –C

Answer Any TWO Questions                                                 (2 x 20 = 40 )

 

  1. a) Explain briefly about Software Engineering Paradigm
  2. b) Discuss in detail about Risk Management

 

  1. a) What is Analysis modeling? Explain the elements of analysis model in detail
  2. b) Write Short notes on DSSD
  3. a) Explain in detail about Black box Testing Techniques.

b)Wrtite Short  on  (i)  Size oriented Metrics     (ii))Function Oriented Metrics

 

 

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Loyola College B.Sc. Computer Science April 2009 Operating System Question Paper PDF Download

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – COMPUTER SCIENCE

SH 12

FIFTH SEMESTER – April 2009

CS 5501 – OPERATING SYSTEM

 

 

 

Date & Time: 16/04/2009 / 9:00 – 12:00       Dept. No.                                                       Max. : 100 Marks

 

 

PART – A

Answer ALL questions:                                                                                  (10 x 2 = 20)  

 

  1. Define: Operating System.
  2. What is Multiprogramming?
  3. Mention any two major activities of an operating system with regard to memory management.
  4. When overlays are used?
  5. When do we say that a system is in safe state?
  6. Write a note on scheduling algorithm.
  7. Write any two advantages of Direct access storage devices.
  8. What do you mean by spooling?
  9. What are the objectives of file Management function?
  10. List out the advantages of UNIX.

PART – B

Answer any FIVE questions:                                                                         (5 x 8 = 40)

 

  1. a) Explain the common operating system services which help the user.

(OR)

  1. b) Explain the various operations on process.

 

  1. a) What do you mean by compaction? Explain.

(OR)

  1. b) Write a note on Segmentation

 

  1. a)Explain on how the Banker’s algorithm used for Deadlock avoidance

(OR)

  1. b) Write a short note on Inter process communication

 

  1. a) Explain about disk scheduling with an example.

(OR)

  1. b) Explain the need for device management

 

  1. a) Explain the two level directory structure

(OR)

  1. b) Write a note on WINDOWS operating system

PART – C

Answer any TWO questions:                                                                          (2 x 20 = 40)

 

  1. a) Explain the various types of system calls normally provided by an operating

system in detail.

  1. b) Explain in detail about Buffering.

 

  1. a) Explain the Segmentation memory management scheme in detail.
  2. b) Discuss in detail about Swapping.

 

  1. a) List out file protection methods and explain any three of them.
  2. b) Explain in detail on Disk scheduling.

 

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Loyola College B.Sc. Computer Science Nov 2009 Web Designing Question Paper PDF Download

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Loyola College B.Sc. Computer Science Nov 2009 Internet Programming Question Paper PDF Download

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“Loyola College B.Sc. Chemistry April 2009 Transition Elements And Nuclear Chemistry Question Paper PDF Download”

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    LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – CHEMISTRY

WD 25

FIFTH SEMESTER – April 2009

CH 5506 – TRANSITION ELEMENTS AND NUCLEAR CHEMISTRY

 

 

 

Date & Time: 17/04/2009 / 9:00 – 12:00       Dept. No.                                                       Max. : 100 Marks

 

 

 

PART-A

 

Answer all the questions                                                                         (10 X 2 = 20) 

  1. Most of the transition metals form coloured compounds. Explain.
  2. Explain the terms Calcination and Roasting giving suitable examples.
  3. What is meant by Half-life period of a radio active element?
  4. Name the important mineral and its composition of lanthanides which occur in India.
  5. Fill in the blanks.
  1. 7N14 + 2He4 → ……. + 1H1
  2. 4Be9 + …… → 6C12 + 0 n1 +  5 MeV.
  1. Complete the following.
  1. 92U238 + 7N14 →  …….+ 4 ( 0 n 1 )
  2. ……. + 8O16 → 100Fm250 + 4 ( 0 n 1)
  1. Explain the co-ordination position isomerism with suitable example.
  2. What is Spectrochemical series? Why is it so called?
  3. Write down the general electronic configuration of actinides?
  4. Define Binding energy of nucleus.

PART-B

 Answer any eight questions                                                                    ( 8 X 5 = 40)

  1. Explain the extraction of Titanium from its chief ore.
  2. Give an account of the various types of furnaces used in the extraction of metals.
  3. What is Lanthanide contraction? What are the consequences of lanthanide contraction?
  4. Give an account of magnetic and spectral properties of actinides.
  5. Sketch all possible isomers of [Co( NH3)2(H2O)2Cl2]+.
  6. Discuss the application of Valence Bond theory to [Fe(CN)6]8- complex.
  7. Discuss the cis-trans isomerism in 4 co-ordinate square planar complexes.
  8. How will the n / p ratio influence the stability of the given nucleus?
  9. Describe the application of neutron activation analysis in trace metal analysis with suitable example.
  10. Describe the principle, working and uses of G.M. Counter.
  11. Explain the salient feature of Shell model.
  12. Discuss the Atomic Power Projects in India.

 

PART-C

 Answer any four questions                                                                (4 X 10 = 40)

  1. Discuss the preparation and applications of any four compounds of transition

elements, which act as industrial catalyst.

24.a) What are inner transition elements? Comment on their position in the periodic table.

  1. b) Describe how lanthanides were successfully separated by ion-exchange
  2. a)What is a Chelate? What are the factors which affect the stability of chelates.
  3. b) How are chelate formation useful in i) Volumetric analysis and ii) Gravimetric analysis.
  1. a)Discuss the splitting of “d” orbitals of metal in square planar complexes with diagram.

b)What are the merits and demerits of Crystal Field Theory?

  1. Write short notes on a) Atomic bomb b) Hydrogen bomb
  2. Describe the Principle, construction, working and applications of a nuclear reactor.

 

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“Loyola College B.Sc. Chemistry April 2009 Thermodynamics Question Paper PDF Download”

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        LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – CHEMISTRY

WD 12

THIRD SEMESTER – April 2009

CH 3504 – THERMODYNAMICS

 

 

 

Date & Time: 05/05/2009 / 9:00 – 12:00  Dept. No.                                                   Max. : 100 Marks

 

 

 

PART – A

Answer ALL questions:                                                                                  10 x 2 = 20     

 

  1. What is Joule Thomson effect?
  2. What are intensive and extensive properties?
  3. Define bond energy. What does a +ve value of bond energy indicate?
  4. Explain heat of transition with a suitable example.
  5. State second law of thermodynamics in any two ways.
  6. Define thermodynamic efficiency. Explain why the efficiency of a heat engine is always less than unity.
  7. State Le chatelier principle.
  8. At a given temperature, the equilibrium constant Kc for the reaction is 4. If the equilibrium concentration of is 0.5 mol lit-1, what is the equilibrium concentration of ?
  9. How would the equilibrium reaction of dissociation of be affected by
  10. addition of b) decreasing the volume of the container
  11. What are the exceptions to the third law of thermodynamics?

 

PART – B

Answer any EIGHT questions:                                                                      8 x 5 = 40

 

  1. Differentiate between reversible and irreversible processes.
  2. What is an adiabatic process? Show that a constant for the reversible adiabatic expansion of an ideal gas.
  3. What is Joule Thomson coefficient? Deduce the relationship between and .
  4. The heat of combustion of carbon monoxide at constant volume at 27oC is -280 KJ. Calculate its heat of combustion at constant pressure. (R=8.314 x 10-3 KJ).
  5. Derive an expression for the entropy change accompanying isothermal expansion of an ideal gas.
  6. What is Gibb’s free energy? How does it vary with temperature and pressure?
  7. Derive an expression for the efficiency of a carnot’s engine working between two temperatures T1 and T2.
  8. State law of mass action. Find expressions for KP and KC for applying the law of mass action.

 

  1. Show that .
  2. Discuss the effect of change of temperature, pressure and concentration, in the contact process of manufacture of sulphuric acid.
  3. The enthalpy of combustion of benzene, carbon and hydrogen are -3267.7 KJ mol-1, -393.5 KJ mol-1 and -286.2 KJ mol-1 Calculate the enthalpy of formation of benzene.
  4. Explain Nernst heat theorem.

 

PART – C

Answer any FOUR questions:                                                                       4 x 10 = 40

 

  1. a) Discuss the variation of a reaction with temperature.
  2. The heat of reaction was found to be -21.976 KJ at 27o What will be the heat of the reaction at 50oC? ()
  3. Explain Hess law of constant heat summation and discuss its applications.
  4. Derive Gibbs – Helmholtz equation and mention its application.
  5. a) Derive the relationship between KP and KC.
  6. Calculate the ratio of KP to KC at 27oC for the reaction .
  7. Derive Vant Hoff equation showing the variation of equilibrium constant with temperature.
  8. a) State the third law of thermodynamics.
  9. b) How is absolute entropy of a substance determined using third law of thermodynamics?

 

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“Loyola College B.Sc. Chemistry April 2009 Synthetics Organic Chemistry And Spectroscopy Question Paper PDF Download”

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    LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

WD 22

B.Sc. DEGREE EXAMINATION – CHEMISTRY

SIXTH SEMESTER – April 2009

       CH 6609 / 6603- SYNTHETICS ORGANIC CHEMISTRY AND SPECTROSCOPY

 

 

 

Date & Time: 25/04/2009 / 9:00 – 12:00     Dept. No.                                                       Max. : 100 Marks

 

 

PART – A

Answer ALL questions:                                                                               (10 x 2 = 20)

  1. What is retrosynthetic analysis in Organic chemistry.
  2. What is disconnection approach.
  3. Write the mechanism of C-alkylation of acetoacetic ester.
  4. Write the product of aldol condensation of Acetaldehyde.
  5. Predict the product of Diel’s – Alder reaction.

(i)                                                                            (ii)

 

 

  1. Write the structure of the product

(i)                                                            (ii)

 

 

  1. Calculate the max value for the following compounds using Woodward Fieser rule?

(i)                                                            (ii)

 

 

  1. Concentrated solution of ethanol and 1, 2- glycol in CCl4 exhibit broad O-H stretch near 3350 cm-1 in their IR spectra. On dilution with CCl4 the spectrum of 1, 2 – glycol does not change but that of ethanol exhibits a sharp band at 3600 cm-1 in addition to the broad band at 3350 cm-1. Explain the observation.
  2. C13 is NMR active while C12 is not explain.
  3. How will you account for the appearance of prominent peaks at m/z 31, 42 and 70 in the mass spectrum of n- pentanol.

PART – B

Answer any EIGHT questions:                                                                   (8 x 5 = 40)

  1. Explain Umpolung synthesis.
  2. What is the difference between conversion and synthesis.
  3. Predict the product of Birch reduction of
  • Benzoic acid (ii) Anisole.
  1. Explain the product and mechanism of hydroboration of propene.
  2. Write the mechanism and stereochemistry of Diel’s Alder reaction of

 

  1. Discuss the method of protecting aldehyde and keto group?
  2. Explain the importance of molecular in peak in mass spectra.
  3. Write note on i) bathochromic shift      ii) coupling constants
  4. How many different set of equivalent protons do each of the following compounds have? How many signals would each compound give in its lH NMR spectram
  5. CH3-CH3 ii) CH3-O-CH3      iii) CH3-CH2–      -CH2-CH3                                iv) CH3 –     -O CH3
  6. Give a brief account on Refrence standards used in ‘H NMR spectral technique.
  7. The IR spectrum of methyl salicylate shows the following peaks at 3300 cm-1 1700 cm-1 3050 cm-1, 1540 cm-1, 1590 cm-1 and 2950 cm-1. Attribute these peaks to the following features of the molecule.
  8. What is meant by shielding and Deshielding of protons in NMR spectoscopy.

PART – C

Answer any FOUR questions:                                                                     (4 x 10 = 40)

  1. What are the application of Electrophilic Synthon and Synthetic equivalent in Retro Synthetic analysis.
  2. i) How does IR spectroscopy useful to distinguish between  a) O-nitro phenol and p-

nitrophenol.

  1. A compound having the molecular formula C10H14 exhibits following HlNMR signals. d28(5H singlet) 0.880 (9 H S). Assign the structural formula of the compound.
  2. i) How are the following groups protected and de protected during the synthesis of organic compound.
  3. –NH2 b) –OH group
  4. An organic compound A (molecular formula C9H10O2) exhibits the following spectral data

IR: 1745 cm-1,             1225 cm-1             749 cm-1               697 cm-1

UV: lmax 268, 264

|HNMR=d1.96(3H, S)              5.00(2H, S)          7.22(5H, S)

  1. i) How will you synthesis i) Acetylacetone               ii) Crotonic acid from ethylacetoacetate.
  • “Diels-Alder reaction is highly stereo specific”. Explain.
  1. Using Umpolung reaction how will you synthesis
  2. C6H5-CH2– -CH3               ii)
  3. Explain any two of the following (5+5)
  4. Clemmenson reduction and its mechanism
  5. Working principle of UV=Visible spectrophotometer with a block diagram.
  6. Oxidation by peracids.

 

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“Loyola College B.Sc. Chemistry April 2009 Polymer Chemistry Question Paper PDF Download”

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        LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – CHEMISTRY

WD 15

FIFTH SEMESTER – April 2009

CH 5402 / CH 5400 – POLYMER CHEMISTRY

 

 

 

Date & Time: 28/04/2009 / 1:00 – 4:00  Dept. No.                                                     Max. : 100 Marks

 

 

PART-A                                      

Answer ALL questions.                                                                                               (10 x 2 = 20)

 

  1. Write any two stereo-isomers of polypropylene.
  2. Why does the melting point of Teflon high?
  3. How is polyester prepared? Give an example.
  4. What is living polymerization?
  5. Mention the importance of benzoyl  peroxide in the polymerization reaction with an example.
  6. Give any two drawbacks of solution polymerization.
  7. Differentiate LDPE and HDPE with any four points?
  8. How is polymethyl metha acrylate synthesized?
  9. What are fire retardants?
  10. What are fire reinforcing plastics?

PART-B                                     

Answer ANY EIGHT questions.                                                                                 (8 x 5 = 40)

 

  1. Write short notes on: (a) Elastomers    (b) Polyisoprene rubber
  2. Explain the role of secondary bond forces in polymers.
  3. Discuss the cationic polymerization with mechanism.
  4. Distinguish between number average molecular mass and weight average molecular mass with suitable example.
  5. Explain the process of bulk polymerization.
  6. Derive the rate constant for anionic polymerization.
  7. Write the order of thermal stability of the following polymers and give reasons for the order you select.

Polytetraflouroethylene, Polyphenylene, Polytetraphenylene.

  1. Write and explain the mechanism of phenol formaldehyde polymer.
  2. How are the following polymers synthesized?

(a)Polystyrene   (b) Buna-S

  1. Explain any two methods of polymer degradation?
  2. Explain the process of injection moulding.
  3. Write short notes on: (a) Antioxidants (b) Fillers

PART-C                                    

Answer ANY FOUR questions.                                                                                  (4 x 10 = 40)

  1. Define the following with example.

(a) Oligomers  (b)Degree of polymerization  (c) Isotactic polymer

(d) Syndiotactic polymer

  1. Discuss the mechanism and its importance of Ziegler Natta polymerization.
  2. Explain the emulsion polymerization with diagram.
  3. What is gas phase polymerization? Explain the mechanism.
  4. What are conducting polymers? Discuss the characteristics of conducting polymers.
  5. Explain the process of calendaring with its applications and limitations.

 

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“Loyola College B.Sc. Chemistry April 2009 Physical Chemistry – II Question Paper PDF Download”

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      LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – CHEMISTRY

WD 01

FIFTH SEMESTER – April 2009

CH 5500 – PHYSICAL CHEMISTRY – II

 

 

 

Date & Time: 16/04/2009 / 9:00 – 12:00    Dept. No.                                              Max. : 100 Marks

 

 

PART – A

Answer ALL questions                                                                                               (10 x 2 = 20)

  1. Write calomel electrode reaction as reduction.
  2. NaCl cannot be used in salt bridge. Why?
  3. Eocell is 1.10V for Zn + Cu2+ → Zn2+ + Cu. Calculate ∆Go cell at 298K.
  4. What are concentration cells? Give one example.
  5. Define transport number of an ion.
  6. 30% of a first order reaction is complete in 100 min. Calculate the rate constant of the reaction.
  7. What is the effect of ionic strength on the rate constant of a reaction of the type A– + B– →

products in solution phase.

 

  1. Mention the steps involved in a thermal chain reaction.

 

  1. “Adsorption is spontaneous and mostly exothermic”.
  2. Define quantum yield of a photochemical reaction.

PART – B

Answer any EIGHT questions                                                                  (8 x 5 = 40 marks)

  1. Derive Nernst equation for a cell reaction and hence deduce an expression for equilibrium constant for the cell reaction.
  2. Calculate Eo cell, Ecell, ∆Go cell and ∆G cell for Zn|Zn2+ (0.01M) ||Ag+ (0.01M) |Ag at 298k. Eored Zn+2|Zn – 076V and Ag+|Ag 0.8V.  Assume n = 2.  Write the electrode reactions.
  3. Write down the electrode reactions in a) lead storage cell   b) H2 – O2 fuel cell.  Mention one salient feature for each.                                                                                 (3+2)
  4. What is Weston – Cadmium cell? Explain its construction and indicate the electrode reactions.                                                                                                                      (2+2+1)
  5. How is transport number of an ion determined experimentally?
  6. Explain the variation of equivalent conductance with concentration for
  7. a) strong electrolyte b) weak electrolyte in water with suitable graph. (2+2+1)
  8. Differentiate order form molecularity.
  9. Explain the principle of conductometric titrations with one example.
  10. The rate of a first order reaction is doubled on increasing the temperature from 27oC to 37oC (R=8.314 JK-1 mol-1.)   Calculate the activation energy of the reaction.
  11. State the postulates of Langumir adsorption isotherm and hence derive the equation. (2+3)
  12. Write briefly on i) photosensitization ii) chemiluminescence.
  13. Derive an expression for rate constant of a second order reaction of the type 2A →products.

PART – C

Answer any FOUR questions                                                   (4 x 10 = 40 marks)

23) a) Explain how ∆Go, ∆Ho, ∆So of a cell reaction be determined using EMF measurements.    (6)

  1. b) Explain the significance of electromotive series.                 (4)
  2. Give an account of any two of the following a) types of electrodes with the relevant Nernst

equations.  b) determination of Ksp of a salt using EMF.  c) Principle for potentiometric acid –

base titrations.  d) standard hydrogen electrode.

  1. a) Derive an expression for Ecell for a chemical cell with transference (6)
  2. b) How is Ka of weak acid determined using conductance measurements?                         (4)
  3. a) Explain any two methods of determining order of a reaction (6)
  4. b) Discuss the mechanism of SN2 reaction with an example. (4)
  5. Explain the kinetics of single substrate enzymatic reaction. How are the kinetic parameterms

evaluated?                                                                                                                               (6+4)

  1. Write notes on any two of the following (5+5)
  2. a) Debye-Huckel theory of strong electrolytes
  3. b) Principle of polarography
  4. c) Quinhydrone electrode & its use.
  5. d) Parallel reactions.

 

 

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“Loyola College B.Sc. Chemistry April 2009 Physical Chemistry – I Question Paper PDF Download”

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      LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – CHEMISTRY

WD 09

THIRD SEMESTER – April 2009

CH 3500 – PHYSICAL CHEMISTRY – I

 

 

 

Date & Time: 06/05/2009 / 9:00 – 12:00  Dept. No.                                                   Max. : 100 Marks

 

 

 

PART – A

Answer ALL the questions                                                                 (10 x 2 = 20 marks)

 

  1. Distinguish Cp and Cv of an ideal gas.
  2. Define: Integral heat of dilution.
  3. Deduce the relationship between Kp and Kc for the following reaction

2NO(g) + O2(g)     2NO2(g)

  1. Dissociation of NH4Cl is represented by the equation

2NH4Cl(s)      NH3(g) + HCl(g)

What is the number of components for it if a start is made with (i) pure NH4Cl    (ii) NH4Cl  and either product of dissociation

  1. State Le Chatelier’s principle.
  2. Apply phase rule to the triple point of water.
  3. State Hess’s law of heat of summation.
  4. Calculate the root mean square velocity of O2 molecule at 27°C.
  5. “Addition of a non-volatile solute lowers the vapour pressure of a solution” – Offer a theoretical explanation for this statement.
  6. State the Nernst distribution law.

PART – B

Answer any EIGHT questions                                                            ( 8 x 5 = 40 marks)

 

  1. Show that the entropy of mixing of ideal gases is positive.
  2. The standard enthalpy of formation of HCl gas at 25°C is -22.06 kcalmole-1. Calculate the ΔE of formation at 250C.
  3. State third law of thermodynamics. Explain how the absolute entropy of a substance can be determined on the basis of the third law of thermodynamics.
  4. State and derive Gibb’s phase rule.
  5. Water gas reaction is represented by the equation

C(s) + H2O(g)     CO(g) + H2(g)

  1. What is the equilibrium law expression for the reaction?
  2. State, giving reasons, how this equilibrium will shift if
  3. all pressures are doubled
  4. the temperature is increased

 

  1. Deduce gas laws on the basis of the kinetic theory of gases.
  2. State and explain Henry’s law. What are the limitations of this law?

 

 

 

 

  1. What is meant by critical solution temperature? How can it be determined for phenol-water system? Explain the effect of addition of NaCl on the critical solution temperature.
  2. How can the molecular mass of a nonvolatile solution be determined from freezing point measurements?
  3. A 0.1formal solution of NaCl is found to be isotonic with a 1.10% solution of urea. Calculate the apparent degree of dissociation of NaCl.
  4. Apply phase rule to Lead-Silver system and discuss the desilverisation of lead from this system.
  5. Draw and explain the phase diagram of any three component system having one partially miscible pair.

PART – C

Answer any FOUR questions                                                                         ( 4 x 10 = 40 marks)

 

  1. Derive Maxwell’s equations from basic thermodynamic ralations.
  2. a. Derive Gibbs-Helmholtz equation.
  3. The measured heats of neutralization of acetic acid, formic acid, hydrocyanic acid and hydrogen sulphide are 13.20, 13.40, 2.90 and 3.80 kcal per geq. respectively. Arrange these acids in the decreasing order of strength.
  4. Draw the phase diagram of FeCl3-H2O system and describe its complete labeling. Explain, What do you understand by the isothermal evaporation of the solution.
  5. a. State and explain Raoult’s law.
  6. What are azeotropic mixtures? Give examples.
  7. a. What are abnormal colligative properties? How will you calculate the vant Hoff factor and degree of dissociation of a solute from the measurement of colligative properties?
  8. 0.9g of a solute was dissolved in 100ml of benzene at 25°C when its density is 0.879g/ml. The solution boiled 0.250°C higher than the boiling point of benzene. Molal elevation boiling point constant for benzene is 2.52 Kkgmol-1. Calculate the molecular weight of the solute.

 

  1. Derive thermodynamically the relation connecting elevation in boiling point of a solution of a non-volatile solute in a volatile solvent and its molality.

 

 

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“Loyola College B.Sc. Chemistry April 2009 Phase Equilibria And Kinetics Question Paper PDF Download”

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       LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – CHEMISTRY

WD 25A

FIFTH SEMESTER – April 2009

CH 5507 – PHASE EQUILIBRIA AND KINETICS

 

 

 

Date & Time: 24/04/2009 / 1:00 – 4:00   Dept. No.                                                      Max. : 100 Marks

 

 

 

PART – A

Answer ALL questions                                                                                 (10 X 2 = 20)

 

  • Identify the number of phases and components at equilibrium

CaCO3(s)                       CaO(s)   +   CO2(g)

2)      Apply phase rule equation at the triple point of water.

3)      What are isotonic solutions?

4)       A solution of 0.1 M NaCℓ aqueous solution has a boiling point of 101.04o C. What will be the boiling point of 0.2 M urea solution Kb = 0.52K kg mol -1?

5)      Define rate constant of a reaction.

6)      What is a zero order reaction?

7)      Calculate the ionic strength of 0.1 m BaCℓ2 solution at 25o C

8)      Enzyme catalysis decelerates at high temperatures.  Why?

9)      What is Wilkinson’s catalyst?

10) Distinguish between adsorption and absorption.

PART – B

Answer ANY EIGHT questions only                                                                      (8 X 5 = 40)

 

  • Draw and describe phase diagram of Pb – Ag system

12)  Explain the phase behavior of a three component system.

13)  What is an azeotrope?  Explain azeotropic distillation with an example.

14)  Derive Nernst Distribution law.

15)  What are chain reactions. Explain with an example.

16)  There is a first order dependence on concentration of KI and K2S2O8.  If the initial concentration of K2S2O8 is ‘a’ moles dm-3 and KI is ‘2a’ moles dm-3.   Derive the expression for the rate constant of the reaction.

17)  Explain the terms order, molecularity and stoichiometry of a reaction with a suitable example.

18)  Explain the kinetics of parallel reactions with an example.

19)  State steady state approximation.  Illustrate with an example

20)  The specific rate of decomposition of HI at 556 K & 781 K are 3.517 X10-7 dm3 mol-1 s-1 and     3.954 X 10-2 dm3 mol-1 s-1 respectively.  Calculate energy of activation in cal mol-1 and Arrhenius pre-exponential factor A in dm3 mol-1 s-1.

 

 

21)  Explain the kinetics of acid catalysed ester hydrolysis.  How the order with respect to each reactant is determined.

22)   Distinguish between physisorption and chemisorption.

 

PART C

Answer ANY FOUR questions only                                                                       (4 X 10 = 40)

 

23)  Draw the phase diagram of FeCℓ3 – water system and apply phase rule.

24)  Derive the relation between elevation of boiling point and morality of the solution, thermodynamically.

25)  Explain any two of the following:                                                                                                        a) Phase diagram of partially miscible liquid pair exhibiting both UCST & LCST                                  b) Application of distribution law to KI  +  I2              KI3 equilibrium                                               c) Raoults law and its deviations                                                                                                        d) Application of Clapeyron equation

26)  A) Describe Van’t Hoff differential method of determination of order of a reaction                                              B) Explain one mechanism of bimolecular surface reaction.

27)  Discuss the kinetics enzyme catalysis as propounded by Michaelis Menton in detail.

How the rate constants of individual steps are evaluated.

28)  State the postulates of Langumir adsorption isotherm and hence derive the equation and explain.

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“Loyola College B.Sc. Chemistry April 2009 Organic Functional Groups II Question Paper PDF Download”

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CH 5505 – ORGANIC FUNCTIONAL GROUPS II

PART – A

Answer ALL the questions                                                                        (10 x2 = 20 marks)

  1. Write the isomers of nitrobutane.
  2. What is diazotization?
  3. Explain with example D and L notation.
  4. Mark R and S configuration for the following compounds
  1.             ii)

 

  1. Write the synthesis of acetoacetic ester by Claisen condensation.
  2. How is diazomethane prepared?
  3. What is Isoprene rule?
  4. What is Fries rearrangement?
  5. What are sulpha drugs?
  6. Draw the structures of the following compounds  (i) α-pinene          ii) Camphor

 

PART – B

Answer any EIGHT  questions                                                        (8 x 5 = 40 marks)

  1. Explain the mechanism of Gomberg reaction.
  2. Which of the following is more basic? p-nitro aniline or  p-Toludine.  Explain
  3. Give an account of the optical activity of biphenyls.
  4. Explain Walden inversion.
  5. Establish keto-enol tautomerism exhibited by acetoacetic ester.
  6. How will you synthesise the following from acetoacetic ester (i) Acetyl acetone  (ii) Crotonic acid?
  7. Write briefly on Beckmann rearrangement.
  8. How is isoquinoline prepared?
  9. How does pyridine react with         i) NaNH2      ii) n-ButylLithium        iii) CH3 COCl/A1C13.
  10. Explain the electrophillic substitution of reactions of pyrrole.
  11. How will you prepare 1, 3, 5 trinitrobenzene?
  12. Explain asymmetric synthesis.

 

 

 

PART – C

Answer any FOUR questions                                                                  (4 x 10 = 40 marks)

  1. (i) How will you separate the mixture of amines by Hinsberg method.

(ii)Explain the coupling reactions of benzene diazonium chloride.

  1. Explain the various methods of Resolution of a racemic mixture.
  2. Write the preparation, properties and uses of diazoacetic ester.
  3. Explain any two following rearragngements with mechanism

(i) Benzilic      (ii) Cope                     (iii) Curtius

  1. i) Name the following compounds based on R and S configuration and represent it in

flying wedge,  sawhorse and Newmann projection formula.

 

 

(ii) Differentiate of enantiomersfrom diastereomers.

  1. (i) Explain Hoffmann’s rearrangement.

(ii) Outline the synthetic utility of Benzene diazonium chloride.

 

 

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“Loyola College B.Sc. Chemistry April 2009 Organic Functional Groups – I Question Paper PDF Download”

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 LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – CHEMISTRY

WD 10

THIRD SEMESTER – April 2009

CH 3502 – ORGANIC FUNCTIONAL GROUPS – I

 

 

 

Date & Time: 02/05/2009 / 9:00 – 12:00       Dept. No.                                                       Max. : 100 Marks

 

 

PART-A                                      

Answer ALL questions.                                                                                  (10 x 2 = 20)

 

  1. What is Saytzeff rule? Give an example?
  2. What happens when n-propyl bromide is treated with alcoholic KOH?
  3. How will you distinguish between methyl alcohol and ethyl alcohol?
  4. Write any two drawbacks of Friedal-Crafts reaction with an example.
  5. How will you synthesise diethyl ether from ethyl alcohol?
  6. Give the general mechanism of nucleophilic addition reactions of carbonyl compounds.
  7. Write the mechanism of Cannizzaro reacton.
  8. Arrange the following compounds in order of increasing acidity and explain you answer.

HCOOH,   ClCH2COOH, CH3COOH

  1. How will you synthesise succinic acid from ethylene?

 

PART-B                                     

Answer ANY EIGHT questions.                                                         (8 x 5 = 40)

 

  1. a) What happens when propene treated with HBr in the presence of organic peroxides?

Explain.

  1. b) Discuss the mechanism of E2 reaction of alkyl halides.
  2. a) Why do aryl halides are less reactive towards nucleophilic displacement reactions?
  3. b) Write the general mechanism of aromatic electrophilic substitution reaction.
  4. How will you convert primary alcohol into tertiary alcohol? Explain.
  5. Discuss the mechanism of sulphonation reaction of phenol.
  6. Write a note on: Kolbe Reaction.
  7. Explain the mechanism of the reaction between aromatic aldehydes and aqueous alcoholic KCN.
  8. Write a note on: Norrish II reaction.
  9. How will you synthesis cinnamic acid from benzaldehyde? Give the mechanism.
  10. a) n-Butyl ether(bp 118 °C) has a much higher boiling point than its isomer diethylether (bp 35 °C).Explain.
  11. b) Write a note on: Cleavage of ethers by acids.
  12. Discuss the effect of the substituents on acidity of carboxylic acids.
  13. Write the mechanism of esterification reaction.
  14. How is adipic acid synthesized from cyclohexane?

 

 

 

 

 

PART-C                                    

Answer ANY FOUR questions.                                                                    (4 x 10 = 40)

 

  1. a) Write any five differences between SN1 and SN2 reaction mechanism. (5)
  2. b) Discuss the mechanism of E2 and explain any three evidences. (5)
  3. Complete the following reactions with mechanism. (5+5)
  4. a) Write the mechanism of wittig reaction. (5)
  5. b) Write a note on: Michael addition. (5)
  6. a) What is Williamson’s synthesis? (3)
  7. b) What happens when glycerol treated with KHSO4? (3)
  8. c) How will you convert acetaldehyde into paraldehyde?                            (2)
  9. d) Give the product when acetone undergoes the condensation in dry HCl. (2)
  10. Write the complete reaction for the following conversions.                           (4 x2.5)
  11. a) Ethylene bromide into succinic acid b) Butene into maleic acid
  12. c) Ethyl acetoacetate into crotonic acid d) Allyl alcohol into acrylic acid
  13. Predict the products of the following reactions. (5×2)

 

 

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“Loyola College B.Sc. Chemistry April 2009 Molecular Dynamics Question Paper PDF Download”

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    LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – CHEMISTRY

WD 19

SIXTH SEMESTER – April 2009

CH 6606 / 6600 – MOLECULAR DYNAMICS

 

 

 

Date & Time: 18/04/2009 / 9:00 – 12:00     Dept. No.                                                       Max. : 100 Marks

 

 

PART – A

 

Answer ALL questions.                                  (10 x 2 = 20 marks)

 

  1. Define the term orbit and orbitals.

 

  1. State Pauli’s exclusion principle.

 

  1. Define the term degeneracy of an energy level.

 

  1. What is Quantum Yield?

 

  1. Give the significance of φ2.

 

  1. Find the value of ln NA!, ( Where  NA   is Avagadro’s number )using Stirlings

approximation.

 

  1. State the Stark-Einistien’s law.

 

  1. Define Chemiluminescence.

 

  1. What are thermal reactions? Give an example.

 

  1. Mention any two methods of studying fast reactions.

 

PART – B

 

Answer any EIGHT questions.                                               (8 x 5 = 40 marks)

 

  1. How is photoelectric effect explained by quantum theory.

 

  1. Calculate the radius of the electron in the first orbit of hydrogen atom.

 

  1. Derive the expression for the energy of an electron in the nth shell of hydrogen.

 

  1. State the postulates of quantum mechanics and explain any one of them.

 

  1. Define the Laplacian operator and Hamiltonian operator.

 

  1. Explain Sackur-Tetrode equation and mention the terms involved.
  2. A system of N particles has among others, two energy levels with g1 = 2,

g2 = 3, E1 = 41.84 kJmol-1  and  E2 = 58.58 kJmol-1.   Calculate the ratio of the number of particles in the two energy states at 1000K.

 

  1. Derive the relation between partition function and energy.

 

  1. Explain Photo sensitisation.

 

  1. Explain the primary and secondary processes in a photochemical reaction.

 

  1. Describe flash photolysis.

 

  1. Explain the kinetics of photochemical reaction between  H2  and  Br2.

 

PART – C

Answer ANY FOUR questions.                                 (4 x 10 = 40 marks)

 

  1. Explain (i) Black body radiation (ii) Separation of partition function.

 

  1. Derive the expression of Eigen value ‘E’ and Eigen function  ‘ψ ‘ for a particle

in one dimensional box.

 

  1. (i) Derive an expression for translation partition function.

(ii)        Calculate the translational partition function for benzene in a volume of

1 m3 at 25oC.

 

  1. Derive the Maxwell – Boltzmann distribution law.

 

  1. Explain any tow of the following

(i)         Radiationless transition.

(ii)        Phosphorescence

  • Actinometers
  • Zeemann effect

 

  1. (i) Derive the Stern-Volmer equation.

(ii)        Explain Jablanski diagram.

 

 

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“Loyola College B.Sc. Chemistry April 2009 Mathematics For Chemistry Question Paper PDF Download”

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       LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – CHEMISTRY

ZA 72

THIRD SEMESTER – April 2009

MT 3103 / 3101 – MATHEMATICS FOR CHEMISTRY

 

 

 

Date & Time: 17/04/2009 / 1:00 – 4:00   Dept. No.                                                        Max. : 100 Marks

 

 

SECTION A

Answer ALL questions:                                                                               (10 x 2 = 20)

  1. If, find.
  2. Solve.
  3. Integrate with respect to x.
  4. Solve
  5. Show that .
  6. Define characteristic roots.
  7. Expand tan 7θ in terms of tanθ.
  8. Find the real and imaginary parts of.
  9. Find the arithmetic mean of the following frequency distribution:

x:         1          2          3          4          5          6          7

f:          5          9          12        17        14        10        6

  1. Write the moment generating function of Poisson distribution.

SECTION B

Answer any FIVE questions:                                                                       (5 x 8 = 40)

  1. Find the maxima and minima of the function.
  2. Find the equation of the tangent to the ellipse at.
  3. Evaluate.
  4. If a,b,c denote three consecutive integers show that
  5. Sum to infinity the series.
  6. Show that
  7. Prove that.
  8. A coffee connoisseur claims that he can distinguish between a cup of instant coffee and a cup of percolator coffee 75% of the time. It is agreed that his claim will be accepted if he correctly identifies at least 5 of the 6 cups. Find his chances of having the claim (i) accepted, (ii) rejected, when he does have the ability he claims.

SECTION C

Answer any TWO questions:                                                                       (2 x 20 = 40)

 

  1. (a) For the curves  and, find the angle of intersection.

(b) Differentiate.                                                                      (12 + 8)

  1. (a) Evaluate .

(b) Integrate  with respect to x.

(c) Solve .                                                       (7 + 5 + 8)

  1. (a) Sum to infinity the series .

(b) Find the characteristic roots and the characteristic vectors of the matrix

.                                                                                           (8 + 12)

  1. (a) Prove that.

(b) Obtain a Fourier expansion for the function.  (10 + 10)

 

 

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“Loyola College B.Sc. Chemistry April 2009 Main Group Elements & Solid State Chemistry Question Paper PDF Download”

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        LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – CHEMISTRY

WD 11

THIRD SEMESTER – April 2009

CH 3503 – MAIN GROUP ELEMENTS & SOLID STATE CHEMISTRY

 

 

 

Date & Time: 05/05/2009 / 1:00 – 4:00  Dept. No.                                                    Max. : 100 Marks

 

 

 

PART – A                                                                              (10 x 2 = 20)

ANSWER ALL THE QUESTIONS

 

  1. Why do group I elements have the lowest first ionization energy values ?
  2. Write the structure of beryllium chloride in the gaseous and solid state.
  3. Write the reaction of aluminum with dilute mineral acid.
  4. How does diborane react with ammonia at different conditions ?
  5. How is tripe super phosphate obtained ?
  6. Write the structure of perdisulphuric acid.
  7. Fluorine is the most reactive of all the elements. Why ?
  8. What are pseudohalides ?  Give examples.
  9. What are Miller indices ?
  10. Define isotropy.

 

PART – B                                                                        (8 x 5 = 40)

ANSWER ANY EIGHT QUESTIONS

 

  1. How lithium differs from the other group I elements ?
  2. What are the uses of the compounds of group I elements ?
  3. How are amorphous and crystalline boron extracted ?
  4. What are the different types of silicates ?
  5. How is hydroxylamine prepared ?  Write the reaction of it with HCl and H2SO4.  Mention its uses.
  6. Draw the structures of phosphorous trioxide and pentoxide.
  7. How is hydrazine prepared ? Give two of its reactions.
  8. How is dichlorine monoxide prepared ?  Mention its reactions and structure.
  9. Mention one method of preparation of a) HClO3    b) HClO4
  10. Mention the different types of crystals.  Give one example each.
  11. What is crystal defect ?  Explain one of it.
  12. Draw and explain simple cubic, face centered cubic and body centered cubic system.

 

PART – C                                                                                    (4 x 10 = 40)

 

ANSWER ANY FOUR QUESTIONS

  1. a) How is sodium metal extracted ?                                                              (5)
  2. b) How beryllium differs from the other group II elements (5)
  3. a) Write a note on the structure of borates.
  4. b) Explain the different types of carbides
  5. a) What are the different types of oxoacids of phosphorus ?

Draw their structures.                                                                                (2+4)

  1. b) How are oxides classified ? Explain. (4)
  2. a) Compare the properties of phosphorous trichloride and phosphorous penta

chloride.

  1. b) Write the preparation and properties of nitric acid.
  2. a)   What is an interhalogen compound ?  Mention their different types.  Give one

example of each.

  1. b) Write the chemical properties of ClF, ClF3    and  I F7
  2. a)  How is X-ray diffraction technique used in the study of crystals ?
  3. b) Derive Bragg’s equation for diffraction of X-rays by crystals.

 

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“Loyola College B.Sc. Chemistry April 2009 Industrial Chemistry Question Paper PDF Download”

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      LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – CHEMISTRY

WD 24

SIXTH SEMESTER – April 2009

CH 6611 / 6605 – INDUSTRIAL CHEMISTRY

 

 

 

Date & Time: 25/04/2009 / 9:00 – 12:00  Dept. No.                                                   Max. : 100 Marks

 

 

PART – A

Answer ALL questions:                                                                               (10 x 2 = 20)

 

  1. Define calorific value of fuels.
  2. Explain: Gobar electric cell.
  3. How is 2, 4-D manufactured?
  4. Give two examples for biofertilisers.
  5. Define Break point chlorination.
  6. Which dissolved salts contribute for permanent hardness?
  7. What is acid rain? How is it caused?
  8. Describe the toxicity of mercury.
  9. What are the constituents of portland cement?
  10. What is a luminous paint? Give an example.

PART – B

Answer any EIGHT questions:                                                                   (8 x 5 = 40)

 

  1. Write a note on Producer gas.
  2. How are coals classified? Give the composition of each type.
  3. What is DDT? How is it manufactured? Indicate its uses.
  4. Write a note on micronutrients and their role in the growth of plants.
  5. How do you estimate calcium hardness in water by EDTA method?
  6. How is water softened by zeolite process?
  7. Explain the principle involved and application of reverse osmosis.
  8. Describe how ozone depletion takes place in stratosphere.
  9. Give an account of BOD determination in waste water.
  10. What are the international standards for drinking water quality? How do they compare with ISI specifications?
  11. Write a note on perfumes and flavouring agents.
  12. Explain the functioning of molybdenum sulphide as a solid libricant.

PART – C

Answer any FOUR questions:                                                                     (4 x 10 = 40)

 

  1. a) Describe the determination of calorific value of a fuel by Bomb calorimeter (6).
  2. b) What are the uses of ETBE and MTBE (4).
  3. a) How are (a) Super phosphate of lime (b) Triple superphosphate manufactured? Which is superior? Why?  (7)
  4. b) What is BHC? How is it manufactured? (3)
  5. a) Outline the process of refining of Petroleum (5)
  6. b) How do you prepare Bordeaux mixture? What is its composition? Mention its use. (5)
  7. a) How is total hardness of water estimated. (5)
  8. b) How are suspended impurities and micro organism removed from water used for drinking purpose? (5)
  9. a) Write a note on air pollution (5)
  10. b) Explain the biochemical effects of nitrogen oxides (5)
  11. a) What are abrasives? How are they classified? Give examples (5)
  12. b) Write a note on pharmaceutical industries in India.

 

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“Loyola College B.Sc. Chemistry April 2009 Hydrocarbons And Stereochemistry Question Paper PDF Download”

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       LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

WD 06

B.Sc. DEGREE EXAMINATION – CHEMISTRY

SECOND SEMESTER – April 2009

CH 2504 / 2502 – HYDROCARBONS AND STEREOCHEMISTRY

 

 

 

Date & Time: 23/04/2009 / 1:00 – 4:00 Dept. No.                                                   Max. : 100 Marks

 

 

PART – A

Answer ALL the questions:                                                             (10 x 2 = 20)

 

  1. Write the structural formula for the following compounds.
  2. 3,3-Dimethyl-1-butene; b) But-2-en-1-ol.
  3. Classify the following into +M and –M group

2 ,   2 ,   ,

  1. What happends when ethylchloride reacts with sodium metal.
  2. What is aromaticity Explain with an example?
  3. Specify the E and Z notation to the following compounds.
  4. a) b)

 

  1. What alkyl halide would yield each of the following pure alkene up on dehydro halogenation by a strong base. a) Isobutylene b) 3-methyl-l-butene.
  2. In Fridel-craft’s alkylation of benzene using n-propyl chloride gave only Isopropyl benzene rather than n-propyl benzene. Explain.
  3. Indicate which ring you would expect undergo nitration in phenylbenzoate.
  4. Write the structure of (i) Cis-4-tert-butylmethyl cyclohexane.                           (ii) cis-1, 2-dimethyl cyclohexane
  5. What are polynuclear aromatic compounds? Give two examples.

 

PART – B

Answer any EIGHT questions:                                                                   (8 x 5 = 40)

 

  1. Write various possible structural formula of alkanes with molecular formula, C5H12 and write their IUPAC names.
  2. Discuss the different factors affecting the stabilities of carbocation (1o, 2o and 3o)
  3. Explain Bayer’s strain theory.
  4. How will you prepare cyclopentane using Dieckmann’s Synthesis.
  5. What are different conformation of cyclohexane. Draw their structure and explain the stabilities.
  6. How is ethylene prepared in the laboratroy? How does it react with
  7. i) Bromine water ii) Conc. H2SO4 iii) HCl                                                            (2+3)
  8. Explain the mechanism of Nitration of benzene.
  9. What is tautomerism. Explain mitro-acinitro tautomerism exhibited by Nitroethane.
  10. Explain by resonance structure that NO2 is meta directing, where as –OH group is Ortho-para directing towards electrophillic aromatic substitution.
  11. Explain the mechanism of Markownikoff’s Propene.

 

  1. i) How will you differentiate 1-butyne from 2-butyne.
  2. ii) Explain the mechanism of Hydroboration of propene.
  3. Write the structure of the product for the following reaction.
  4. Napthalene
  5. Napthalene
  • 2-butene
  1. Nitrobenzene
  2. Phenol

PART – C

Answer any FOUR questions:                                                                     (4 x 10 = 40)

 

  1. a) Explain the type of hybridisation in the following
  2. i) Benzene ii) 1, 3 – buta-diene iii) cyclohexane                       iv) l-butyne.
  3. Which is more basic ethylamine or Aniline Explain.
  4. a) Explain Hyper conjugation.
  5. Arrange the compound in the increasing order of acid strength and Explain.
  6. CCl3 COOH ii) CH3 COOH,           iii) CH3 CH2 CH2 COOH       iv)CH2Cl OOH
  7. A hydrocarbon ‘A’ adds one mole of hydrogen in the presences of a platinum catalyst to form n-hexane. When A is oxidised vigourously with KMnO4, a single carboxylic acid containing three carbon atoms is isolated. Give the structure and name of A. Show your reasoning including equation for all reactions.
  8. i) Explain 1,2 – and 1,4 – addition of HBr with 1,3-butadiene.
  9. Write the mechanism Fridel – Craft’s Acylation
  10. i) Predict the product of Bromination of
  11. Acetanilide b) cinnamic acid
  12. Explain Diel’s Alder reaction taking suitable example.
  13. Draw various possible conformation of n-butane explain their stabilities based on energy level diagram?

 

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