B.Sc. Chemistry Question paper

Loyola College B.Sc. Chemistry April 2007 Inorganic Chemistry – I Question Paper PDF Download

by

 

LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – CHEMISTRY

LM 01

 

FIRST SEMESTER – APRIL 2007

CH 1500 – INORGANIC CHEMISTRY – I

 

 

Date & Time: 24/04/2007 / 1:00 – 4:00 Dept. No.                                                Max. : 100 Marks

 

 

PART – A

Answer all the questions                                  (10 x 2 = 20)

  1. Differentiate electron affinity from electro negativity.
  2. Why is an anion always bigger and a cation always smaller in size than the parent atom?
  3. Which are readily soluble in water (a) CaCO3 (b) K2CO3? Give reasons.
  4. Why is the electron affinity of nitrogen almost zero while that of fluorine is high?
  5. Explain why the bond angle in water is less than that of methane?
  6. Explain the term covalency. What is the maximum covalency which the element of  fifth group

can exhibit?

  1. Name the types of hybridization in (a) SF6    (b) BeF
  2. What are protic and aprotic solvents? Explain with an example.
  3. Give any two oxoacids of nitrogen and indicate the oxidation state of nitrogen.
  4. How is hydrazine prepared? Mention any two uses.

PART – B

      Answer any eight questions                                 (8 x 5 = 40)

  1. Construct Born Haber’s cycle for the formation of NaCl and explain the terms involved in

calculating the lattice energy.

  1. Explain the structure of HF and H2O using valence bond theory.
  2. Explain the types of hydrogen bonding and explain any two of its consequences.
  3. Discuss the structure of (a) PCl5 (b) COCl2 using hybridization theory.
  4. What are London forces? How do these originate?
  5. Explain the concepts of acids and bases by a) Lewis b) Bronsted- Lowry system.
  6. Explain n-type and p-type semicondutors with suitable examples.
  7. Write short notes on nitrogen fixation.
  8. Explain the anomalous behaviour of oxygen from the rest of the elements in its group.
  9. Give the preparation, properties and uses of hydroxylamine.
  10. Explain how H2O2 acts both as oxidizing and reducing agent with two examples
  11. Explain how does O3 react with a) PbS  b) KI

 

PART – C

 

Answer any four questions                                                 (4 x 10 = 40)

  1. (a) Define electronegativity. How is it determined by different scales of  electronegativity?

Explain with examples the factors affecting it.                                                        (2+ 5+3)

  1. Construct a qualitative MO energy level diagram for N2 Write the MO electronic

configuration, bond order and predict the magnetic nature.

  1. Explain the postulates of VSEPR theory and explain the structure of
  2. a) ClF3        b) ICl4–                                                                             (4+3+3)
  3. Write short notes on:    a) leveling effect of solvent    b) symbiosis
  4. c)  precipitation reaction in liq. ammonia.                                              (4+3+3)
  5. Write short notes on hydrides and halides of
  6. Explain the classification of oxides and their properties.

 

Go To Main page

 

Loyola College B.Sc. Chemistry April 2007 Industrial Chemistry Question Paper PDF Download

by

LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – CHEMISTRY

LM 22

SIXTH SEMESTER – APRIL 2007

CH 6605 – INDUSTRIAL CHEMISTRY

 

 

Date & Time: 23/04/2007 / 9:00 – 12:00 Dept. No.                                                Max. : 100 Marks

 

 

PART- A                                            (10×2=20)

Answer ALL the questions.

  1. Write the role of phosphorous and potassium in the healthy growth of plants.
  2. Give the structure and uses methoxychlor.
  3. Differentiate between scale and sludge.
  4. How will you prepare saccharin?
  5. What is break point chlorination?
  1. Define octane number.
  2. How is coal classified on basis of its rank?
  3. What are the advantages of gaseous fuels over other forms of fuel?
  4. What are primary and secondary air pollutants? Give examples.
  5. What are the causes of radioactive pollution?

 

 

PART- B                                                        (8×5=40)

Answer any EIGHT questions

  1. a) Explain the disadvantages of hard water in industries.
  2. b) Discuss any two methods for the prevention of scale formation.
  3. Write a note on ion exchange resins with examples. How are ion exchange resins regenerated in

demineralisation process?

  1. Describe continuous hot lime soda process of water softening.
  2. Explain the manufacture of the following.
  3. a) Ammonium sulphate b) Urea
  4. Briefly describe the role of micronutrients and their functions in plants.
  5. How will you prepare aldrin? Give its important uses.
  6. Explain the manufacture of paper with the help of a flow chart.
  7. What is cracking? Write the advantages of catalytic cracking over thermal cracking?
  8. Describe a method to determine chemical oxygen demand of waste water.

 

 

  1. a) What are greenhouse gases? Discuss their contribution to global warming. (3)
  2. b) Write a method for the treatment of cyanide poisoning. (2)
  3. Write short notes on
  4. a) Anti-knocking agents b) Biogas                                                        (2+3)
  5. Write the composition and uses of any five fractions obtain by the distillation of crude

petroleum.

PRAT-C

 

Answer any FOUR questions.                                                                      (4×10=40)

 

  1. Explain zeolite process for the removal of hardness of water. Give any two advantage and

disadvantages of this process.                                                                                    (6+4)

  1. a) Discuss the various steps involved in the glass manufacture.                          (8)
  1. b) Give the composition of common glass. (2)
  1. a) Explain how sterilization of water is carried out by chlorination. Give its advantage and

disadvantages.                                                                                                (6)

  1. b) Describe the merits and demerits of using urea as fertilizer.                           (4)
  2. a)Define calorific value of a fuel. (2)
  3. b) Explain the construction and working of bomb calorimeter with a neat labelled

diagram.                                                                                                  (3+3+2)

  1. a) What is natural gas? Name the different types of natural gas. Give the uses. (6)
  2. b) Write a note on acid rain.                                                                                             (4)
  3. a) Explain the biochemical effects of

(1) Carbon monoxide         (2) Ozone        (3) Lead                                (2+2+2)

  1. List any four water quality parameters and indicate the permissible limits for the significant

parameters.                                                                                                        (4)

 

Go To Main page

Loyola College B.Sc. Chemistry April 2007 Hydrocarbons And Stereochemistry Question Paper PDF Download

by

LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc.

DEGREE EXAMINATION –CHEMISTRY

SECOND SEMESTER – APRIL 2007

CH 2502 – HYDROCARBONS AND STEREOCHEMISTRY

 

 

Date & Time: 20/04/2007 / 1:00 – 4:00            Dept. No.                                                     Max. : 100 Marks

 

 

 

PART – A

 

Answer ALL the questions                                   (10 x 2 = 20)

 

  1. Classify the following into +I and –I group: isopropyl, cyano, methoxy and
    t-butyl. Justify.
  2. Write the structural formula for the following compounds
  3. a) 1-hydroxy-2-propanone b) 3,5-octadiene
  4. Arrange the following acids in the increasing order of the acid strength and justify your answer: (CH3)3C-COOH, H-COOH and CH3-COOH.
  5. Mention the differences between inductive effect and inductomeric effect.
  6. Why is fluorination faster than chorination of alkane?
  7. What is aromaticity? Explain with an example.
  8. Why does maleic acid give anhydride readily and fumaric acid gives its anhydride only on heating?
  9. Specify the E and Z notation to the following compounds:

 

 

 

  1. What are the two alkyl halides formed on the addition of HCl to 3-methyl-1-butene?
  2. What are polynuclear aromatic compounds? Give two examples.

 

PART – B

Answer any Eight questions                                                   (4 x 5 = 20)

  1. Write various possible structural formulae of alkanes with molecular formula, C6H14 and write their IUPAC names.
  2. Discuss the different factors affecting the stability of free radicals (primary, secondary and tertiary).
  3. Explain Baeyer’s strain theory and theory of strainless ring.
  4. Write short notes on i)Wurtz synthesis of hydrocarbons ii) Dieckmann’s synthesis of cycloalkanes.
  5. What are the different conformers of cyclohexane? Give the structures and discuss which structure is more stable.
  6. How is ethylene prepared in the laboratory? How does it react with i)bromine water ii) Con.H2SO4 iii) HCl iv) acidified KMnO4 v) hypochlorous acid vi) ozone
  7. Explain the mechanism of electrophilic substitution of (i) Friedal-Crafts  acylation (ii) sulphonation of benzene.
  8. What is tautomerism? Explain keto-enol tautomerism in detail.
  9. Why carboxyl group is meta orienting and carboxylate ion is ortho and para directing?
  10. How will you prepare the following:
  • n-propanol from propene (ii) Glycol from ethylene.
  1. Explain the mechanism of markownikoff and antimarkownikoff addition of propene.
  2. Write the structure of the product in the reaction of

 

Naphthalene                          H2/Ni

Naphthalene               con.H2SO4/HgSO4

2-pentyne                    Alkaline. KMnO4

2-butyne                           O3/hydrolysis

Naphthalene                         CH2O+HCl

 

PART – C

 

Answer any FOUR questions                                            (4 x 10 = 40)

 

  1. Explain the mode of hybridization of carbon in methane, ethylene and acetylene. Explain why aliphatic amines are more basic than aromatic amines.
  2. Explain the mechanism of halogenation of alkanes and what are the factors affecting the rate of the reaction.
  3. a) Why does the electrophilic substitution reaction of naphthalene take place in the carbon1(α) rather than on carbon 2 (β)
  4. b) Explain the 1,4- and 1,2- addition reactions of dien in detail.
  5. On reduction of compound C6H10(A) gives first C6H12(B) and finally C6H14(C). On ozonolysis followed by reduction (A) gives two aldehydes C2H4O (D) and C2H2O2 (E). Oxidation of B with acidified potassium permanganate gives the acid C3H6O2(F), Identify the compounds A to F and express the various reactions involved by means of equations.
  6. a) What is orientation effect? Explain with examples.
  7. b) Write short notes on i)Diels – Alder reaction ii) Hydroboration reaction.
  8. Write the Newman projection formulae of comparatively stable conformation of butane. Which one of them is preferred conformation?

Go To Main page

Loyola College B.Sc. Chemistry April 2007 General Microbiology Question Paper PDF Download

by

          LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – CHEMISTRY& ADVAN.ZOOLOGY

IB 40

 

FOURTH & THIRD SEMESTER – APRIL 2007

PB 4200 / 3200 – GENERAL MICROBIOLOGY

 

 

 

Date & Time: 26/04/2007 / 9:00 – 12:00 Dept. No.                                                Max. : 100 Marks

 

 

 

PART A

 

  1. Choose the correct answer (5 x 1 = 5 )

 

  1. Protozoans belong to
  2. a) monera b) protista                    c) viruses                     d) animalia
  3. EMB agar is a __________ medium.
  4. a) differential b) selective                  c) enrichment              d) general
  5. ______ is involved in the transfer of genetic material between different cells.
  6. a) pili b) fimbria                    c) flagella                    d) mesosomes
  7. Thiobacillus is involved in _______ cycle
  8. a) nitrogen b) carbon                     c) sulfur                       d) phosphorus
  9. The device that involves conversion of biochemical signal to electric signal is called
  10. a) biosensor b) electrosensor                         c) thermistor              d) bioconvertor

 

 

  1. State whether the following statements are True or False (5 x 1 = 5 )

 

  1. Viruses are free living entities.
  2. Enrichment cultures are used routinely for all microbes.
  3. DNA polymerase is involved in replication of DNA.
  4. Bacterial diseases can be controlled by fungicides.
  5. Proteases and lipases are used in the formulation of detergents.

 

 

III. Complete the following                                                                 (5 x 1 = 5)

 

  1. Among fungi, sexual reproduction is absent in ______________.
  2. The time taken by a bacterium to divide into two cells is called ________.
  3. Lac operon concept explains the principle of __________.
  4. Little leaf of brinjal is caused by _________________.
  5. _______ is a widely used method for preservation of milk.

 

 

 

 

 

 

  1. Answer the following each in about 50 words (5 x 1 = 5)

 

  1. What are microalgae?
  2. Define axenic cultures.
  3. What are plasmids?
  4. Give the composition of Bordeaux mixture.
  5. What are vaccines?

 

PART B

 

Answer any five of the following each in about 350 words. Draw necessary diagrams.

(5 x 8 = 40)

  1. Enumerate the general characteristics of viruses.
  2. Explain the stages of microbial growth.
  3. What is conjugation? Add a note on the movement of DNA during conjugation.
  4. Describe the disease cycle in wheat rust.
  5. Bring out the commercial applications of microbial enzymes.
  6. Give an account of Nitrogen cycle.
  7. Describe the process involved in Penicillin production.
  8. Give the methods for food preservation from microbial spoilage.

 

PART C

 

Answer the following questions in about 1500 words. Draw necessary diagrams

(2 x 20 = 40)

 

  1. a. Explain how bacteria are classified based on their shape and flagellation. Add a note on the ultrastructure of bacterial cell

(or)

 

  1. Write notes on :   i) Transduction                   ii) Transformation.

 

  1. a. Write notes on the pathogen, symptoms and control measures for
  2. i) Citrus canker ii) Tobacco mosaic disease

 

(or)

 

  1. Describe the process involved in primary and secondary treatment of waste water.

 

 

Go To Main page

 

Loyola College B.Sc. Chemistry April 2007 General Chemistry For Physics & Maths Question Paper PDF Download

by

LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc.

LM 04

DEGREE EXAMINATION – MATHS / PHYSICS

SECOND SEMESTER – APRIL 2007

 

CH 2102/2100/3100 – GENERAL CHEMISTRY FOR PHYSICS & MATHS

 

 

Date & Time: 23/04/2007 / 1:00 – 4:00            Dept. No.                                                     Max. : 100 Marks

 

 

 

PART-A

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

  1. Why are transition metal compounds colored? Give an example.
  2. Name the following compounds systematically.
  3. a) [Cr(en)2(NH3)2]Cl3 b) K3[Fe(H2O)(CN)5]
  4. Draw the resonance structures of phenol.
  5. How is nitronium ion generated for nitration reaction?
  6. Define Henry’s law. What are its drawbacks?
  7. State Grothus-Draper law.
  8. Draw the structure of Adenosine nucleotide.
  9. Write a short note on adrenaline.
  10. Bring out the differences between thermoplastics and thermosetting plastics.
  11. Define corrosion. Give any two examples.

 

PART-B

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

  1. Calculate the EAN and predict whether the following complexes are stable or not.
  2. a) [Fe(CN)6]3- b) [Pt(Cl)4]2-
  3. Discuss the geometrical isomerism exhibited by the complexes with coordination number 4 and 6.
  4. Explain the mechanism of chlorination of benzene.
  5. Draw the potential energy diagram for the conformational changes of n-butane along C2-C3 axis.
  6. Write the mechanism of SN1 reaction with an example.
  7. Compare ideal and non-ideal solutions. Give an example for each.
  8. Discuss the phase diagram of phenol-water system in detail.
  9. Explain how chlorophyll is helpful for photosynthesis.
  10. Give a detailed account on sex hormones.
  11. Discuss on the structure and types of RNA in detail.

 

 

 

  1. How are Nylon66 and polystyrene synthesized? Mention their uses.
  2. Mention any two methods of prevention of corrosion in detail.

 

PART-C

Answer any FOUR questions.                                                            (4 ´ 10 = 40 marks)

23     a) Explain Werner’s coordination theory in detail.                                (5)

  1. b) Using valence bond theory, bring out the structure and magnetic property of the following compounds. (2 ´ 2½)
  2. i) [Cu(Cl)4]2-                           ii) [Fe(H2O)6]2+

24     a) How will you distinguish maleic acid from fumaric acid? Explain any two methods.                                                                                                (5)

  1. b) Define the following terms. (1 + 2 + 2)
  2. i) Chirality ii) Enantiomers            iii) Diastereomers

25     Discuss the phase diagram of one component system in detail.                        (10)

26     a) Define half-life period. Calculate the t1/2 of a first order reaction.                (5)

  1. b) Discuss the causes of corrosion. (5)

27     a) Draw the structure of the following                                                          (2 ´ 2½)

  1. i) uracil ii) adenine
  2. b) Differentiate DNA and RNA with any five points. (5)

28     How will you differentiate the following?                                                        (5 + 5)

  1. a) Condensation polymerization and addition polymerization
  2. b) Natural polymers and synthetic polymers.

 

Go To Main page

 

 

 

 

Loyola College B.Sc. Chemistry April 2007 General Chemistry For Physics & Maths (2) Question Paper PDF Download

by

LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – MATHEMATICS & PHYSICS

LM 08

 

FOURTH & THIRD SEMESTER – APRIL 2007

                 CH 4200 / 3200- GENERAL CHEMISTRY FOR PHYSICS & MATHS

 

 

 

Date & Time: 26/04/2007 / 9:00 – 12:00 Dept. No.                                             Max. : 100 Marks

 

 

PART- A                                                                     (10×2=20)

Answer ALL the questions.

 

  1. What are heterocyclic compounds? Give an example.
  2. State and explain Hess’s law.
  3. How will you synthesis pyrrole from furan?
  4. What are azo dyes? Give an example.
  5. Give the structure and uses of 2, 4, D.
  6. What are oligosaccharides? How they are classified?
  7. Differentiate intensive and extensive properties with example.
  8. Define first law of thermodynamics.
  9. What are peptides? Give the structure and name of any one dipeptide.
  10. Write a short note on antipyretics with an example.

 

PART- B                                                        (8×5=40)

Answer any EIGHT questions.

 

  1. Discuss the different types of hydrogen bonding with suitable examples.
  2. Explain the Haworth synthesis of naphthalene.
  3. Give a method of preparation and uses of malachite green.
  4. Derive Kirchoff’s equation.
  5. Explain the cyclic structure of glucose.
  6. How will you synthesize glycine by Gabriel phthalimide synthesis?
  7. Explain the manufacture of the following.
  8. a) Super phosphate of lime b) Urea
  9. What is nuclear fission reaction? Explain its importance.
  10. Explain the secondary structure of proteins.

 

 

  1. a) Define octane number.
  2. b) Give the preparation and uses of DDT.
  3. Draw and explain standard hydrogen electrode.
  4. Discuss the role of macronutrients and micronutrients.

 

PART- C                                                                    (4×10=40)

Answer any FOUR questions.

 

  1. a) Explain the theory of hydrogen bonding. (4)
  2. b) Discuss the separation of lanthanides by ion exchange method.                         (6)
  3. a) Write short notes on antibiotics. Give the structure of penicillin. (5)
  4. b) How will you prepare sulphanilimide? Give its uses.                         (5)
  5. a) Discuss any three factors influencing the activity of enzymes? (6)
  6. b) Explain Sanger’s method for the determination of N- terminal

analysis of aminoacids.                                                                                   (4)

  1. Discuss the different types of conductometric titrations. (10)
  2. a) Write a note on chromophore and auxochrome with examples.               (5)
  3. b) How is thiophene synthesized? Describe any one reaction. (5)
  4. Draw Born-Haber cycle and explain the calculation of lattice energy. (10)

 

Go To Main page

Loyola College B.Sc. Chemistry April 2007 Fin. Accounts & Fin. Stat. Analysis Question Paper PDF Download

by

         LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc.,B.A. DEGREE EXAMINATION –MATHS.,CHEM.,ECONOMICS

TH 62

FOURTH SEMESTER – APRIL 2007

CO 4201 – FIN. ACCOUNTS & FIN. STAT. ANALYSIS

 

 

 

Date & Time: 19/04/2007 / 9:00 – 12:00   Dept. No.                                            Max. : 100 Marks

 

 

Section – A

Answer all Questions .                                                                                                          10×2=20

 

  1. What is double entry system of book – keeping ?
  2. State the rules for debiting and crediting.
  3. What is convention of conservatism ?
  4. What is Trial balance ?
  5. What is Earnings per share ?
  6. Distinguish between capital expenditure and revenue expenditure ?
  7. Why is Bank Reconciliation prepared ?
  8. Compute the amount that should be debited to Income and Expenditure a/c.

Stock of balls and bats as on  1.1.04 Rs.2000

Purchase of balls and bats during  04 Rs.7500

Stock of balls and bats as on 31.12.04 Rs.3600.

  1. Give a proforma of P/L Appropriation a/c.

10.Calculate Net profit and Gross profit Ratio. Sales Rs. 5,00,000 ; Gross profit

Rs.1,50,000. Net profit before tax Rs.1,00,000 ; Tax rate is 40 %.

 

Section – B

 

Answer any five Questions                                                         (5×8=40)

 

  1. Distinguish between Receipt and Payment account and Income and Expenditure

account.

  1. Explain the advantages and limitations of cash flow analysis.
  2. Explain the fundamental concepts of double entry system.
  3. Enter the following transactions in the proper subsidiary  books:

Bought from Rathi Coal Co. 100 tones of steam coal @ Rs.577.50 per tonne.

Bought from Bishamber Dayal.

200 tones of soft coke @ Rs 465.00 per tonne.Less 5 % Trade Discount.

Bought from Central Coal Co.

200 tonnes of hard  coke @ Rs.522.50 per tonne.Less 5 %  Trade Discount.

Sold to Tea House.

10 tonnes of soft coke @ Rs.500.00 per tonne.Less 2.5  Trade Discount.

Sold to Widsons Industries.

400 tonnes of coal at an average price of Rs.532.50 per tonne.Less 5% Trade

Discount.

 

  1. Write the following transactions in a Three – Column Cash Book and bring down

the balances.

2001                                                                            Rs

Dec.  1 Cash in hand                                                                               200

Cash at bank                                                                            1,800

 

4  Received cash from Sri Ram                                                       95

Allowed him discount                                                                   5

6  Purchased stationery for cash                                                      20

7  Paid to Sri.Shyam by cheques                                                   330

Received discount                                                                        10

12 Rahim settled his account for less 5% discount by cheque        500

18 Paid sundry expenses in cash                                                        30

23 Paid to Sri Jadu in cash                                                               190

Received discount                                                                         10

24 Withdrew from bank for office cash                                           100

 

  1. The comparative Balance Sheet of M/s.Ram brothers for the two years were as

follows :

—————————————————————————————————-

 

Liabilities                        1984            1985      Assets                1984             1985

Rs.               Rs.                                   Rs.                 Rs.

Capital                             1,50,000  1,75,000    Land & Buil.     1,10,000     1,50,000

Loan from Bank              1,60,000  1,00,000    Machinery         2,00,000     1,40,000

Creditors                             90,000  1,00,000    Stock                    50,000        45,000

Bills payable                        50,000     40,000    Debtors                70,000        80,000

Loan from S.B.I                       __        25,000    Cash                     20,000       25,000

————————-                           ————————–                                                                              4,50,000    4,40,000                             4,50,000     4,40,000

————————–                           ————————-

Additional Information  :

  1. Net profit for the year 1985 amounted to Rs .60,000.
  2. During the year a machine whose book value 15,000  was sold for Rs.13,000.

You are required to prepare a cash flow statement.

 

  1. From the following particulars of a trade , prepare a Bank Reconciliation Statement as on 30th April , 2001 :
    • Bank overdraft as per Cash Book Rs. 7,050.
    • During the month , of cheques deposited into bank , one cheques for Rs.1,860 has not been collected.
    • cheques issued for Rs.7,150 has not yet encashed .
    • As per instruction, the bank had paid out 1,750 to a creditor , but the same has not yet been entered in the cash book.
    • a debtor had deposited directly into the bank Rs.1,500 but the same has not been recoded in the Cash Book.
    • the bank without any intimation had debited his account  for Rs.20 as bank charges and credited the same for Rs.30 as interest .

 

 

 

 

 

 

 

 

 

 

 

 

  1. Following is the Balance Sheet of Y Ltd.

Rs                                                     Rs

Eqty,share capital           1,00,000          Cash at bank               12,000

6% Pref.share capital     1,00,000          Bills Receivable          50,000

Debentures                        60,000          Debtors                       70,000

Reserves                         1,50,000          Stock                           40,000

Creditors                                      67,000           Furniture                   1,30,000

Bank Over Draft              40,000           Buildings                   2,20,000

Proposed Dividend           30,000          Goodwill                     45,000

Profit & Loss a/c               20,000

————                                           ————-

5,67,000                                             5,67,000

————-                                          ————-

Calculate  Short term solvency and Long term solvency Ratios.

 

Section – C

Answer any two questions                                                       (2×20 = 40)

 

  1. With the help of the following ratios regarding Indu films draw the Balance Sheet of

the Company for the year 1985.

 

Current  ratio                                                                 2.5

Liqudity ratio                                                                 1.5

Net Working capital                                                       Rs.3,00,000

Stock Turnover ratio (cost of sales / closing stock)       6 times

Gross profit ratio                                                            20 %

Debt collection period                                                    2 months

Fixed assets turnover ratio (on cost of sales)                 2 times

Fixed assets to shareholders net worth                          0.80

Reserve and surplus to capital                                       0.50

 

 

  1. From the following information relating to Indian Cricket Club, prepare Income and Expenditure Account for the year ending 31st March,1991 and Balance Sheet as at that date. Abstract of Hon. Secretary’s cash book for the year is as follows :

Rs.                                                                   Rs.

To members’ subscription          8,000   By Upkeep of field and pavilion         2,000

To members’ admission Fee        300    By Expenses regarding Tournament   3,700

To sales of Old Balls, Bates,etc     50    By Rates and Insurance                      1,500

To Hire of Ground                       300    By printing and stationery                     100

To subscription for Tournament 4,000 By Bats , Balls,etc.                               2,700

To Bank drawn                             4,000 By Bank Lodged                               16,650

To Donation                                10,000

———                                                            ———

26,650                                                           26,650

———-                                                           ———

Assets on 1st April ,1990 :                                                 Rs.

Cash at bank                                                                     3,000

Stock of Bats, Balls, etc                                                   1,500

Printing and stationery                                                         200

Subscription due                                                                  500

Liabilities on 1st April ,1990                                                 nil

 

Donation and surplus on account of tournament   should be kept in reserve for a permanent pavilion. Subscription due at 31st March,1991,Rs.750 ; Write off 50 percent of Bats , Balls Account and 25 percent of printing and stationery account.

 

  1. From the following Trial Balance as on 31.3.2001, Prepare Trading Account , Profit

and Loss Account  for the year ended 31.3.2001 and a Balance Sheet as on that date

Debit Balance                               Rs             Credit  Balance                  Rs

 

Drawings                                       3,600        Capital                                40,000

Machinery                                   10,000        Purchase Return                   1,240

Stock                                           13,750        Discount Received                   980

Purchases                                 1,09,600        Sundry Creditors                  15,000

Sales Return                                  1,800        Sales                                   1,30,150

Carriage Outwards                        2,300

General Expenses                         1,100

Advertisement                              1,350

Wages                                           2,600

Rent and Taxes                             3,500

Bad Debts                                        970

Sundry Debtors                            33,950

Bank                                              2,500

Cash                                                  350

————-                                                  ————-

1,87,370                                                   1,87,370

————-                                                ————–

 

The following adjustments are necessary –

Machinery is to be depreciated by 5% p.a

  1. Outstanding wages Rs . 250.
  2. Write off bad debts Rs . 700.
  3. Rent & Taxes paid in advance Rs 100.
  1. Stock on 31.3.2001 Rs . 19,500.

 

Go To Main page

Loyola College B.Sc. Chemistry April 2007 Coordination Chemistry Question Paper PDF Download

by

LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

LH 18

B.Sc. DEGREE EXAMINATION – CHEMISTRY

SIXTH SEMESTER – APRIL 2007

CH 6601 – COORDINATION CHEMISTRY

 

Date & Time: 18/04/2007 / 9:00 – 12:00     Dept. No.                                                   Max. : 100 Marks

 

 

PART-A

ANSWER ALL QUESTIONS. EACH QUESTION CARRIES TWO MARKS

  1. Calculate the CFSE for [Co(NH3)6]3+.
  2. Draw the structure of (a) Et2DTC and (b) 1,10-phenanthroline.
  3. What is Irving-Williams series?
  4. The thermodynamic stability of complexes of Sc(II), Mn(II), and Zn(II) is lesser than the corresponding complexes of the rest of the first row transition metals. Give reason.
  5. What is nephelauxetic ratio? Mention its significance.
  6. Octahedral complexes of Ni(II) are paramagnetic whereas its square planar complexes are diamagnetic. Explain.
  7. For which of the configuration Jahn Teller distortion is detected, low spin d4 or high spin d6 in an octahedral geometry? Give reason.
  8. Draw the structures of (pentaheptocyclopenadienyl)(allyl)(dicarbonyl)molybdenum and

[Cr(h6-benzene)(CO)3].

  1. How is trans-[Pt(NH3)2Cl2] prepared?
  2. Mention the biological roles of Co(II) and Cr(III).

PART-B

ANSWER EIGHT QUESTIONS. EACH QUESTION CARRIES FIVE MARKS 

  1. Draw the crystal field splitting energy level diagram in tetrahedral complexes.
  2. Discuss the photoisomerization reactions of coordination complexes.
  3. Write a note on superoxide dismutase.
  4. Discuss the template synthesis with any two examples.
  5. How does the nature of the metal ion influence Do of complexes?
  6. Give an account of M-L covalency in transition metal complexes.
  7. Discuss the associative mechanism of ligand substitution reactions in octahedral complexes.
  8. Explain Static-dynamic Jahn Teller distortion with an example.
  9. Give an account of the organometallic compounds of cyclobutadiene and their reactivity.
  10. Account for the following: (a) metal carbonyls are thermally unstable and (b) organometallic compounds are formed by metals in their lower oxidation states.
  11. Explain the structural features of Fe2(CO)9 and Co2(CO)8.
  12. Explain the mechanism of alkene hydrogenation by Wilkinson catalyst.

 

PART-C

ANSWER FOUR  QUESTIONS. EACH QUESTION CARRIES TEN MARKS 

  1. Discuss the active centre and function of nitrogenase enzyme.
  2. Discuss the mechanism and evidences of inner-sphere electron transfer reactions in coordination compounds.
  3. Discuss the structural features of Schiff base ligands and their ability to form metal complexes.
  4. State Jahn teller theorem. Mention the consequences of Jahn Teller distortion. Explain Jahn Teller distortion in six-coordinate complexes with the aid of qualitative crystal field splitting energy level diagram.
  5. Explain the following with examples: (a) oxidative-addition reaction, (b) insertion reaction, and

(c) reductive elimination reaction.

  1. (a) Give an account of the failure of crystal field theory. (b) Construct the qualitative MO energy level diagram for an octahedral complex involving M-L sigma bond only.

 

 

Go To Main page

Loyola College B.Sc. Chemistry April 2007 Concepts In Inorganic Chemistry Question Paper PDF Download

by

LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc.

LM 03

DEGREE EXAMINATION – CHEMISTRY

FIRST SEMESTER – APRIL 2007

CH 1503 – CONCEPTS IN INORGANIC CHEMISTRY

 

 

Date & Time: 26/04/2007 / 1:00 – 4:00          Dept. No.                                                     Max. : 100 Marks

 

 

 

 

Part A

Answer all the questions.                                                                                      10×2=20

  1. State Mulliken’s scale of electro negativity.
  2. How are the molecular shapes predicted using Sidgwick-Powell theory?
  3. Why is 4s orbital lower in energy than 3d orbital?
  4. Which of the following sets of quantum numbers are not allowed?
    1. n = 3, l = 4, m = -1 , s = +1/2
    2. n = 2, l = 2, m = 0 , s = +1/2
  5. What is intra molecular hydrogen bonding? Give an example.
  6. Calculate the amount of energy required to convert 1.5g of potassium atoms in the gaseous state to form potassium ions. Ionization energy of potassium is 419 kJ mol-1 and atomic mass of potassium is 39 amu.
  7. Why the bond angle of water is reduced to 104° from the normal tetrahedral angle?
  8. Give Lewis definition of acid and base with an example.
  9. Write the electronic configuration of Mn2+ and Al3+.
  10. Write the expression for Schrodinger wave equation and define the terms involved.

 

Part B

Answer any eight questions.                                                                                  8×5=40

  1. Discuss the hybridization of IF5 with the help of VSEPR theory.
  2. Write notes on Zone refining and Mond’s process?
  3. Normalize the wave function y = sinx between the limits +p to -p
  4. Draw the molecular orbital diagram of CO and calculate the bond order.
  5. How is the lattice energy of a solid obtained from Born-Haber cycle?
  6. State and explain Fajan’s rules to explain the covalent character in ionic compounds with examples.
  7. Discuss the crystal structure of CsCl.
  8. Explain symbiosis with examples.
  9. Discuss the variation in electron affinity along the period and down the group.

 

 

  1. Explain the following:
  2. a) Electron affinities of halogens are very high.
  3. Ionic radius of K+ is smaller than that of Cl– but both are isoelectronic.
  4. MgS is harder than LiCl.
  5. Using band theory of metals explain the nature of conductors, insulators and semiconductors.
  6. Explain ‘leveling effect’ with two examples.

 

Part C

Answer any four questions.                                                                                 4x 10=40

  1. Discuss the salient features of the periods in the modern periodic table.
  2. How are the following factors affect the ionization energy
  3. a) atomic size b) nuclear charge
    c) screening effect                   d) electronic configuration
  4. Draw and explain the molecular orbital diagram of oxygen and calculate the bond order of O2, O2–, O22- and O2+.
  5. Explain the hybridization of a) SF4 b) SF6
  6. Draw and explain Ellingham diagram for the reduction of metal oxide by carbon.
  7. Discuss the following reactions in liquid ammonia giving two examples of each type:
  8. a) acid-base reactions b)ammonolysis
    c)complex formation               d) precipitation reactions

 

Go To Main page

Loyola College B.Sc. Chemistry April 2007 Chemistry Of Materials Question Paper PDF Download

by

LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc.

AC 11

DEGREE EXAMINATION –CHEMISTRY

SIXTH SEMESTER – APRIL 2007

CH 6602 – CHEMISTRY OF MATERIALS

 

 

Date & Time: 20/04/2007 / 9:00 – 12:00          Dept. No.                                                     Max. : 100 Marks

 

 

Part A

Answer all the questions.                                                                                      10×2=20

  1. Calculate the miller indices of crystal planes, which cut through the crystal axis at (3a, b, c).
  2. Mention the differences between phosphorescence and fluorescence.
  3. State the law of cryatallography.
  4. Mention the differences between diamagnetic and paramagnetic materials?
  5. Give one example of crystal growth by chemical vapor deposition method.
  6. Mention the uses of the following crystals
  7. a) Si b) quartz c) GaAs           d) CaF2
  8. Define liquid crystals.
  9. An organic compound crystallizes in an orthorhombic system with two molecules per unit cell. The unit cell dimensions are 12.05, 15.05 and 2.69Ao. If the density of the crystal is 1.419g/cm3 , calculate the molar mass of the organic compound.
  10. Differentiate anisotropy and isotropy.
  11. State Curie-Weiss law.

Part B

Answer any eight questions.                                                                                  8×5=40

  1. Explain BCS theory with an example.
  2. How is the structure of compounds determined by single crystal X-ray diffraction             method?
  3. Explain the process of crystallization by Bridgeman method?
  4. Discuss the phenomenon of antiferromagnetism. How does it differ from ferromagnetic materials?
  5. Describe the structure of sodium-β-alumina.
  6. A paramagnetic material has a magnetic field intensity of 104 A/m. If the susceptibility of the material at room temperature is 3.7 x 10-3, calculate the magnetization and flux density in the material.
  7. Mention the differences between ferroelectric and piezoelectric crystals with examples.
  8. Explain the photo reduction of water with an example.
  9. What is Schottky defect? Explain with an example.

 

 

 

  1. What is Kirkendall effect? Explain.
  2. The TG curve of 125.7 mg of sample that contained a mixture of

CaC2O4.H2O (MW 146) and a thermally stable salt exhibited a weight loss of

6.98 mg at a temperature of 140°C corresponding to the loss of water. Determine the percentage of CaC2O4.H2O in the sample.

  1. How is flame fusion method helpful for the growth of crystals?

 

Part C

Answer any four questions.                                                                                 4X10=40

  1. What are the types of non-stoichiometric defects? Explain with examples.
  2. Explain the following:
  3. a) Meissner effect b) working principle of sodium-sulphur battery. (5+5)
  4. Draw and explain the crystal structure of spinel and inverse spinel with examples.
  5. Describe the photolysis of water with an example.
  6. Explain the following with examples:
  7. a) Cheveral phases
  8. b) hard and soft magnets (5+5)
  9. a) Name the seven basic crystal systems and fourteen Bravais lattices. Give examples

with their interfacial angles and primitive values.

  1. b) What are the types of lattices available depending upon the shape of the unit cell

and calculate the number of atoms per unit cell in each case.                         (6+4)

 

Go To Main page

 

Loyola College B.Sc. Chemistry April 2007 Chemistry For Biologists – Theory Question Paper PDF Download

by

  LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – ADV.ZOO.&PLANT.BIO.&BIOTEC.

LM 07

THIRD SEMESTER – APRIL 2007

CH 3102 – CHEMISTRY FOR BIOLOGISTS – THEORY

 

 

 

Date & Time: 02/05/2007 / 9:00 – 12:00       Dept. No.                                                       Max. : 100 Marks

 

 

 

Part A

Answer all the questions.                                                                                      10×2=20

  1. Define ionization energy.
  2. Draw the resonance structures of phenol.
  3. What is the oxidation state of the central metal ion in the following coordination compounds a) [Co(NH3)6]Cl3     b)K3[Fe(CN)6]
  4. What is Brownian movement?
  5. Calculate the pH of 0.001N NaOH.
  6. What are enantiomers? Give an example.
  7. Mention the differences between order and molecularity.
  8. Why is chloroacetic acid stronger than acetic acid?
  9. Why do ionic compounds usually have higher melting point than the covalent compounds?
  10. Define chiral carbon.

Part B

Answer any eight questions.                                                                                  8×5=40

  1. Derive Henderson equation for basic buffer.
  2. What are the factors affecting the rate of the reaction?
  3. Derive the rate expression for the reaction A®
  4. What are the requirements of a primary standard?
  5. Explain the structure of SF6 using hybridization.
  6. Explain Electrophoresis with a diagram.
  7. Draw and explain the crystal structure of NaCl.
  8. Explain the process of vulcanization of rubber in detail.
  9. Give reasons for the increase in acidity of the following:
  10. Propionic acid < acetic acid < formic acid
  11. a-Chloropropionic acid > b- chloropropionic acid

 

 

  1. Explain any two methods of separation of racemic mixture.
  2. Explain the optical isomerism of lactic acid.
  3. Mention the differences between homo- and heterogeneous catalysis with examples.

Part C

Answer any four questions.                                                                                 4X10=40

 

  1. Explain the geometrical and optical isomerism in octahedral complexes with one example for each.
  2. Explain the hybridization of IF7 and XeF6 using VSEPR theory.
  3. a) Describe any two methods for determining the order of a reaction.
  4. b) What is inter- and intramolecular hydrogen bonding? Explain with examples.
  5. Mention the differences between
  6. a) Coagulation and peptisation
  7. b) Lyophilic and lyophobic colloids
  8. a) Explain electro osmosis with a diagram.
  9. b) Draw and explain the crystal structure of CsCl.
  10. How are the following polymers manufactured?
  11. a) Nylon b) Terylene c) bakelite                    d) PVC

 

 

Go To Main page

 

 

Loyola College B.Sc. Chemistry April 2007 Bio-Chemistry For Biologist Question Paper PDF Download

by

LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – ADV. ZOO.& PLA.BIO.&BIOTEC.

LM 10

FOURTH SEMESTER – APRIL 2007

CH 4202 – BIO-CHEMISTRY FOR BIOLOGIST

 

 

Date & Time: 19/04/2007 / 9:00 – 12:00      Dept. No.                                             Max. : 100 Marks

 

 

PART A

Answer all the questions.                                                                                            10×2=20

  1. What was the contribution of James B Sumner to biochemistry?
  2. What is feedback inhibition? Give an example.
  3. Mention the uses of glycogen.
  4. Explain isoelectric point.
  5. Draw the structure of cholesterol.
  6. What are the differences between DNA and RNA?
  7. Convert fructose into glucose.
  8. Define iodine value.
  9. Draw the structures of camphor and nicotine.
  10. What are essential fatty acids? Give examples.

PART B

Answer any eight questions.                                                                                        8×5=40

  1. How is the structure of fructose elucidated?
  2. Explain the factors influencing the enzymatic action.
  3. Describe the importance of macro and micronutrients.
  4. What are cephalins and plasmalogens? Explain.
  5. Explain the different types of soil.
  6. How are alkaloids isolated?
  7. Explain the replication of DNA.
  8. What is Line Weaver Burk plot? Mention its significance.
  9. Explain the classification of terpenes.
  10. Explain the mechanism of enzymatic action.
  11. Explain the secondary structure of proteins.
  12. How is the structure of DNA explained by Watson and Crick model?

PART C

Answer any four questions.                                                                                       4×10=40

  1. Draw and explain the structure of t-RNA.
  2. Describe the importance and uses of anthocyanines, flavones and flavanoids.
  3. Explain the enzymatic inhibition with examples.
  4. How is N-terminal of an amino acid determined by Edman and Sanger’s method?
  5. How is glucose converted to pyruvate? Explain.
  6. Explain the classification of enzymes with their functions and examples.

 

 

Go To Main page

Loyola College B.Sc. Chemistry April 2007 Bio Chemistry Question Paper PDF Download

by

LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc.

LM 16

DEGREE EXAMINATION –CHEMISTRY

FIFTH SEMESTER – APRIL 2007

CH 5401 – BIO CHEMISTRY

 

 

Date & Time: 02/05/2007 / 1:00 – 4:00          Dept. No.                                                     Max. : 100 Marks

 

 

PART – A

Answer all the questions                                                     (10 ×2 = 20 marks)

  1. Define isoelectric point of an amino acid.
  2. Mention the components of the nucleus and give their functions.
  3. Define enzyme immobilization.
  4. What happens during rancidification?
  5. How is starch different from glycogen?
  6. What are sterols? Give an example.
  7. What is Sanger’s reagent? Mention its use.
  8. What are plasma proteins? Give an example.
  9. What are carbohydrates? How are they classified?
  10. Why DNA is the genetic material whereas RNA is not?

 

                                                           PART – B

Answer any eight questions                                                (8 × 5 = 40 marks)

  1. a) What is meant by denaturation of proteins?
    b) Give the mechanism of reaction of amino acids with ninhydrin.
  2. Explain the structure and functions of the following organelles
    a) cell wall b) golgi apparatus                    c) vacuole
  3. Suggest a method of synthesis for the following amino acids
    a) alanine b)methionine                           c) cysteine.
  4. Explain the mechanism of enzyme catalyzed reaction using Lock and Key and Induced fit models.
  5. How are fats classified? Give suitable examples.
  6. Explain β-oxidation of fatty acids.
  7. Elucidate TCA cycle.
  8. Write note on the electron transport chain.
  9. Name the different types of RNA and list down their functions.
  10. ‘DNA replicates semi-conservatively’. Explain.
  11. What is a genetic code? Give its significance.
  12. How are phospholipids classified? Give suitable examples.

 

PART – C

Answer any four questions                                                (4 × 10 = 40 marks)

  1. Explain the following
    a) deamination b) transdeamination
    c) transamination         d) ornithine cycle
  2. What are inhibitors? Explain competitive, non-competitive and allosteric inhibitions.
  3. a) How are fatty acids biosynthesized
    b) What are phospholipids? How are they classified?
  4. Explain glycolysis.
  5. a) Distinguish between animal and vegetable fats.
    b) Give the various steps involved in oxidative phosphorylation.
  6. How are proteins biosynthesized?

 

 

Go To Main page

Loyola College B.Sc. Chemistry April 2007 Analytical Chemistry Question Paper PDF Download

by

LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – CHEMISTRY

LM 14

FIFTH SEMESTER – APRIL 2007

CH 5501 – ANALYTICAL CHEMISTRY

 

 

 

Date & Time: 28/04/2007 / 1:00 – 4:00 Dept. No.                                                Max. : 100 Marks

 

 

 

PART A

 

Answer the following                                                                             10×2 = 20

 

  1. What are antidotes? Cite two examples.
  2. What is sublimation? Mention two compounds which can be purified by this method.
  3. How is adsorption different from absorption? Name one analytical technique, which uses adsorption phenomenon?
  4. What are Rf values? Mention their significance.
  5. What are primary standards and secondary standards?
  6. What is solubility product? What is its application?
  7. Distinguish end point from equivalence point.
  8. What is the unit for measuring strength of an acid? Give its mathematical expression.
  9. Explain coprecipitation and post precipitation.
  10. Give an account of Beer-Lambert’s law. What is its use?

 

 

PART B

Answer any eight of the following:                                                       8×5 = 40

 

  1. How are burettes and standard flasks calibrated?
  2. Explain various types of errors.
  3. Give the principle involved in solvent extraction technique, with special reference to distribution coefficient.
  4. How is an aromatic carboxylic acid recrystallised?
  5. Describe the detection of compounds by thin layer chromatographic technique.
  6. Molecular weight of a dibasic acid is 50. What is the amount of this acid required to prepare 250mL of its 0.2N solution?
  7. Derive Henderson’s equation.
  8. Describe precipitation titration with an example.
  9. The solubility product of a sparingly soluble MX type salt is 10 -14 at 250 Calculate its solubility in molarity if its molecular weight is 100.
  10. What are the precautions to be taken to avoid error while precipitating a compound in gravimetric analysis?
  11. What are Selection Rules? Give selection rules for electronic (UV- vis) spectroscopy.
  12. Taking a planar triangular molecule as example, explain various types of vibrations. (Show sketch)

 

 

Cond….2

 

 

 

 

PART C

 

Answer any four of the following:                                                        4×10 = 40

 

  1. Write an essay on errors in chemical analysis, with special reference to types and minimizing the same.
  2. Explain fractional distillation with an example.
  3. In principle, how is ion exchange chromatography different from other chromatographic techniques? How is this technique useful in softening of water?
  4. Discuss complexometric titrations.
  5. How is indicator decided for an acid – base titration? Explain using phenolphthalein and methylorange as indicator.
  6. Write short notes on (i) chromophores

(ii) auxochrome

(iii) signal to noise ratio

(iv) line-width

 

 

Go To Main page

 

 

Loyola College B.Sc. Chemistry April 2007 Allied Mathematics For Chemistry Question Paper PDF Download

by

              LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – CHEMISTRY

CV 09

 

THIRD SEMESTER – APRIL 2007

MT 3101 – ALLIED MATHEMATICS FOR CHEMISTRY

 

 

 

Date & Time: 28/04/2007 / 9:00 – 12:00   Dept. No.                                          Max. : 100 Marks

 

 

SECTION A

Answer ALL questions:                                                                                  10 ´ 2 = 20

  1. Find the angle which the tangent at (2, 4) to the curve y = 6 + x – makes with the x-axis.
  2. Differentiate with respect to .
  3. Evaluate .
  4. Solve (+ D + 1)y = 0.
  5. Sum the series to .
  6. Solve .
  7. Write down the value of in powers of .
  8. Prove that cosh(x – y) = coshx coshy – sinhx sinhy.
  9. What is the chance that a leap year selected at a random will contain 53 Sundays?
  10. Let X be a random variable with the following distribution
X –3 6 9
P(X)

Find the expectation of X.

 

 

SECTION B

Answer any FIVE questions:                                                                          5 ´ 8 = 40

  1. What is the maximum value of .
  2. Evaluate .
  3. Sum the series to
  4. (a) Solve z = px + qy + 2.

(b) Obtain a partial differential equation by eliminating a, b from. (4 + 4)

  1. Expand in a series of sines of multiples of .
  2. Prove that (a) sinh 3x = 3sinh x + 4.

(b) .                  (4 + 4)

  1. A problem in statistics is given to 5 students whose chances of solving are respectively. What is the probability that the problem will be solved if all of them try independently?
  2. The mean yield for one-acre plot is 662 kilos with a S. D 32 kilo. Assuming normal distribution, how many one-acre plots in a batch of 1000 plots would you expect to have yield       (i) Over 700 kilos

(ii) Below 650 kilos

given that, , .

 

 

SECTION C

Answer any TWO questions:                                                                          2 ´ 20 = 40

  1. (a) Differentiate (i) , (ii)

(b) Show that the parabolas  and  cut orthogonally. (5 + 5 + 10)

  1. (a) Solve.

(b) Prove that.                       (8 + 12)

  1. (a) Sum the series to .

(b) Find the eigen values and eigen vectors of .  (8 + 12)

  1. (a) Obtain the Fourier series for the function and

deduce that .

(b) Find the mean of the Binomial distribution.   (15 + 5)

 

 

Go To Main page

“Loyola College B.Sc. Chemistry April 2008 Thermodynamics Question Paper PDF Download”

by

LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – CHEMISTRY

GH 13

 

THIRD SEMESTER – APRIL 2008

CH 3504 – THERMODYNAMICS

 

 

 

Date : 07/05/2008                Dept. No.                                        Max. : 100 Marks

Time : 9:00 – 12:00

PART – A                              (10 x 2 = 20 marks)

Answer ALL the questions.

  1. Define the term state junction.
  2. What is meant by Joule-Thomson effect?
  3. Define the heat of combustion.
  4. What do you understand by enthalpy change of a system?
  5. What is efficiency of a carnot engine?
  6. How is entropy of a system related to its temperature?
  7. State the Law of mass action.
  8. Why are exothermic reactions generally spontaneous?
  9. What are the properties of equilibrium constant?
  10. State the III law of thermodynamics.

PART – B

                                                                        (8 x 5 = 40 marks)

Answer any EIGHT questions.

  1. The van der waals constants a and b for hydrogen in dm3 atm units, are 0.246 and 2.67 x 10-2 respectively. Calculate the inversion temperature of hydrogen. Define Ti.
  2. Derive Kirchoff’s equation.
  3. State and explain the heat capacity of a system. Show that you one mole of an ideal gas           Cp – Cv = R.
  4. State and explain the term bond energy.  Discuss its application.
  5. Define and explain the term heat of neutralization.
  6. Describe in detail the Carnot reversible cycle.
  7. State and explain the II law of thermodynamics.
  8. Derive the Gibbs – Helmholtz equation. Give its application.
  9. Explain the Le-chatelier Principle with an example.
  10. Derive the vant Hoff’s isotherm.
  11. Explain the various forms of equilibrium constants.
  12. Explain the Nernst heat theorm.

PART – C

                                    (4 x 10 = 40 marks)

Answer any FOUR questions.

  1. Explain the postulates and derive the kinetic theory of gases.
  2. a) One mole of naphthalene was burnt in oxygen gas at constant volume to give carbon dioxide gas and liquid water at 250C. The heat evolved was found to be 5138.8 kJ. Calculate the enthalpy of reaction at constant pressure.
  1. b) Explain the term standard heat of formation.
  1. a) Derive the Maxwell’s equation.
  1. b) Derive the equation for entropy of mixing.
  1. Derive the equations and explain the dissociation of ammonia.
  2. a) Derive the relationship between Kp and Kc.
  1. b) Give any two applications of law of mass action.
  1. Explain how the absolute entropy of a substance is determined with the help of third law of thermodynamics.

 

 

Go To Main Page

“Loyola College B.Sc. Chemistry April 2008 Synthetics Org.Chem. & Org. Spectroscopy Question Paper PDF Download”

by

GH 23

 

LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – CHEMISTRY

SIXTH SEMESTER – APRIL 2008

CH 6603 – SYNTHETICS ORG.CHEM. & ORG. SPECTROSCOPY

 

 

 

Date : 25/04/2008                Dept. No.                                        Max. : 100 Marks

Time : 9:00 – 12:00

PART – A

                                                Answer all the questions.                                          (10  ´  2   = 20)

 

  1. What is the range of Infrared radiations ?What are the units used in IR spectroscopy.
  2. What is chemical shift ?Why do we choose Tetra methyl silane (TMS) as a standard substance for recording chemical shift values.
  3. How many NMR signals would you expect from the following compounds i.Toluene   ii.Allyl alcohol.
  4. How will you use the UV- Visible spectral data to distinguish between the following pairs –  Ethyl benzene  and Styrene.
  5. What is Nitrogen rule with respect to mass spectroscopy.
  6. How will you convert diethyl malonate to butanoic acid?
  7. Complete the following reactions.

 

  1. Name the reagents A and B used to effect the following conversions.
  2. i) CH3-CH=CH-CHO   CH3-CH=CH-CH2OH

 

  1. Complete the following reactions.
  2. i) R2CHOH     ?
  3. ii) CH3-CH2-CO-CH2-CH2-CH3  ?
  4. Explain functional group inter conversion with an example.

PART – B

Answer any Eight questions                         (8  ´  5  = 40)

 

  1. The Infrared spectrum of methyl salicylate shows the following peaks at 3300 cm-1 , 1700 cm-1, 3050 cm-1, 1540cm-1, 1590 cm-1 and 2950 cm-1 Attribute these peaks to the following features of the molecule.

(i) – CH3   (ii)  C = O    (iii)  – OH group on the ring   (iv) Aromatic ring.

 

  1. Write sort notes on a. bathochromic shift

b.Hypsochromic shift

  1. Hyper chromic shift

 

  1. What is meant by shielding and deshielding of protons in NMR spectroscopy.
  2. What is mass spectroscopy ? What is the principle of mass spectroscopy.

 

  1. The mass spectrum of 2- pentene shows m/e peaks at 70 , 55, 41, 29 and 27. Write down the different fragments and correlate their m/e values with the m/e peaks obtained.

 

  1. Calculate the λ max values for the following compounds . Give reasons for your interpretations.
  2. Discuss any two methods that are commonly used for protection of alcoholic – OH group during synthesis of a organic compound.

 

  1. How will you synthesize acetophenone using umpolung reaction.

 

  1. Describe the use of chromic acid in the oxidation of alcohols and ketones. Write the mechanism involved.

 

  1. How is NaBH4 prepared ? Write any three synthetic applications of NaBH4.

 

  1. What is hydroboration ? Write the reagents and the mechanism involved in the reaction which converts propene to 1– propanol.

 

  1. For the Diels Alder reaction predict the major product.

 

PART – C

     Answer any four questions.                    ( 4 ´ 10 = 40 )

  1. i). Which one of the following compounds is most consistent with the IR spectrum given in the following figure.? Give reasons for your interpretation. C6 H5 – OH ,  C6H5 – COCH3 , C6H5 – COOH , C6H5 –CH2OH.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ii). Describe the appearance of the proton NMR spectrum of each of the following compounds. How many signals would you expect to find and how many peaks will each signal be split.

(a) Cl CH2 – O – CH2 CH3        (b) 1,2-dichloroethane             (c) p-diethyl benzene.

 

  1. i)How does Infrared spectroscopy useful to distinguish between inter molecular H-bonding and intramolecular H-bonding ? Explain using suitable examples.

 

  1. ii) A hydrocarbon shows a mass parent peak at m/e 102. It exhibits NMR signals δ 7.4           (5 H ,Singlet) and δ 3.08 (1H Singlet). What is the probable structure of the hydrocarbon?

 

  1. i) Describe the working principle of a UV–Visible spectrophotometer using a simple block diagram .

ii)Account for the splitting of PMR signals.

 

  1. i) Explain the term umpolung with an example.

 

  1. ii) Using 1,3 dithianes , how will you effect the following conversions.
  2. benzaldehyde to C6H5 CH2CH2 C6H5
  3. formaldehyde to C6H5 CH2CH2CH2CH2

 

  1. i) How are the following groups protected and deprotected during synthesis of organic compounds.

(a)  –  NH2 gp.             (b) – CHO gp.

  1. ii) Complete the following reactions

(a)  CH3-CH2-CHO   +   CH3-NH-CH3   ¾®  ?

(b)

 

  1. i) How will you synthesize

(a) Succinic acid

(b) Crotonic acid

from ethylacetoacetate

 

  1. Diels Alder reaction is highly stereo specific – Account.

 

 

Go To Main Page

“Loyola College B.Sc. Chemistry April 2008 Polymer Chemistry Question Paper PDF Download”

by

LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

           B.Sc. DEGREE EXAMINATION – CHEMISTRY

GH 16

FIFTH SEMESTER – APRIL 2008

CH 5400 (POLYMER CHEMISTRY)

 

 

 

Date : 03-05-08                  Dept. No.                                        Max. : 100 Marks

Time : 1:00 – 4:00

PART-A                                  

 

Answer ALL  questions.                                                                                 (10×2=20)

  1. How will you differentiate oligomers from polymers?
  2. Write the H-bondeed structure of polyamide and give its importance.
  3. Draw the structure of isotactic polymer of polypropylene.
  4. Write the photo initiation mechanism of ethylene using benzoyl peroxide.
  5. What is the role of surfactants in emulsion polymerization?
  6. What is pearls polymerization?
  7. How is PMMA prepared?
  8. Mention any two uses for each thermo and thermosetting polymers.
  9. How will you increase the strength and elasticity of natural polymers?
  10. Write the name of the polymer process which enables the production of following.
  11.  i) Soft drink bottles

ii)Film and sheets

 

PART-B      

 

Answer any eight questions.                                                                           (8×5=40)

  1. Write short notes on Mn & Mw with examples.
  2. Discuss the characteristics of a monomer with three examples.
  3. Discuss the geometrical isomerism of polybutadiene with structure.
  4. What are living polymers? Explain with mechanism.
  5. Explain the different types of polymerization.
  6. What is solution polymerization? Explain its advantages.
  7. How are the following polymers prepared?
  8. i) Polystyrene  ii) Nylon 6,6   iii) Teflon
  9. Differentiate electrometric compounds and fibre forming plastics.
  10. Explain the variance of conductivity values of doped and undoped polyacetylene.
  11. Discuss the advantages of die-casting.
  12. Write a note on (i) antioxidats

(ii) colourants.

  1. What is FRP? Explain the process of hand lay-up technique.

 

 

PART-C                                     

 

Answer any four questions.                                                                            (4×10=40)

  1. a) What are secondary bond forces? Give its importance in polymers. (6)
  2. b) Explain the linear and cross-linked polymer with example.                       (4)
  3. What are stereo-regular polymers? Discuss the mechanism of preparation using coordination catalyst.                                                                                     (2+8)
  4. Compare the bulk and gas phase polymerization techniques with example.
  5. Thermal stability of polymers depends on their structure. Explain in detail with examples.
  6. Explain the following polymerization process.
  7. i) compression moulding                                                                                 (5)
  8. ii) film casting.                                                                                                (5)
  9. Give the preparation and uses of the following. (5×2=10)
  10. i) Buna-S      ii) PAN      iii) Polyethylene   iv) PVC    v) Kevlar fiber.

 

 

Go To Main Page

“Loyola College B.Sc. Chemistry April 2008 Physics For Chemistry Question Paper PDF Download”

by

LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – CHEMISTRY

FG 44

 

SECOND SEMESTER – APRIL 2008

PH 2100 / 3102 – PHYSICS FOR CHEMISTRY

 

 

 

Date : 25/04/2008                Dept. No.                                        Max. : 100 Marks

Time : 1:00 – 4:00

 

PART A ( 20 MARKS)

ANSWER ALL QUESTIONS                                                          10 X 2 = 20

 

  1. When is a periodic motion said to be simple harmonic ?
  2. Define angular momentum. Give it’s unit.
  3. What is meant by parking orbit ?
  4. State the principle of equivalence.
  5. State Hooke’s law.
  6. Define surface tension. Give it’s unit.
  7. State Heisenberg’s uncertainty principle.
  8. Write down the time dependent Schrodinger equation.
  9. Distinguish between loudness and intensity.
  10. What are overtones ?

 

 

PART B (30 MARKS )

ANSWER ANY FOUR QUESTIONS.                                4 X 7.5  = 30

 

  1. Show that the oscillations of a liquid in a U tube are simple harmonic and find the time period.
  2. State and explain Kepler’s laws.
  3. Obtain an expression for the excess pressure over the curved surface of a liquid.
  4. Derive the time independent Schrodinger equation. How is the wave function interpreted ?
  5. What are beats ? Discuss any one application.

 

PART C ( 50 MARKS )

 

ANSWER ANY FOUR QUESTIONS.                                4 X 12.5 = 50

 

16.(a) Derive an expression for the acceleration of a solid sphere rolling down an inclined plane                       without slipping

(b) A particle executing simple harmonic motion in a straight line makes 120 complete oscillations            in 1 minute and its maximum velocity is 6∏ m/s .Find the length of the path and the maximum            acceleration.

  1. (a) Describe an experiment to measure the gravitation constant.

(b) Determine the escape velocity for the earth.( Radius of the earth is 6400 km and value of g at             the earth’s surface is 9.8 m/s2 )

  1. (a) Derive a relation between the three elastic modulii.

(b) Define Poisson ratio. What are the limits for this ratio?

  1. Describe the experiment of Davisson and Germer and discuss the results.
  2. Derive an expression for the velocity of transverse waves in a stretched string. Use this to explain       the laws of transverse vibrations of a stretched string.

 

Go To Main Page

“Loyola College B.Sc. Chemistry April 2008 Physics For Chemistry Question Paper PDF Download”

by

LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – CHEMISTRY

RO 31

 

SECOND SEMESTER – APRIL 2008

PH 2103 – PHYSICS FOR CHEMISTRY

 

 

 

Date : 25/04/2008                Dept. No.                                        Max. : 100 Marks

Time : 1:00 – 4:00

 

SECTION – A

Answer all the questions                                                                   (10 x 2 = 20 Marks)

 

  1. What are holonomic and non-holonomic constraints?
  2. Sketch the displacement – time graph and velocity – time graph.
  3. What is meant by parking orbit for a satellite?
  4. State the Principle of equivalence of the general theory of relativity.
  5. Define surface tension and give its unit.
  6. Calculate the rigidity modulus and Poisson’s ratio for silver.

(Given, Young¢s modulus = 7.25 x 1010 N/m2 and bulk modulus = 11 x 1010 N/m2)

  1. What are optically active materials? Give two examples.
  2. In Fraunhoffer diffraction pattern due to a narrow slit, a screen is placed 2m away from the lens to obtain the pattern. If the slit width is 0.2 mm and the first minima lies 5 mm on either sides of the central maximum, find the wavelength of light.
  3. Define unit cell.
  4. Define lattice and basis.

 

SECTION – B

Answer any Four questions                                                             (4 x 7.5 = 30 Marks)

 

  1. Obtain expressions for time of flight, greatest height and range of a projectile motion.
  2. Discuss qualitatively any two experimental tests of general theory of relativity.
  3. Obtain an expression for the excess of pressure inside
  • a spherical soap bubble
  • a spherical liquid drop

 

  1. Explain the use of a plane transmission grating to measure wavelength of a spectral line.
  2. State Bragg’s law. Explain the Laue method of X-ray diffraction.

 

SECTION – C

 

Answer any Four questions                                                 (4 x 12.5 = 50 Marks)

 

  1. Set up the Lagrangian and solve the Lagrange’s equation of motion for
  1. Atwood’s machine  (6 marks)
  2. Simple pendulum (6 ½ marks)
  1. a) Describe an accurate method of determining the value of the gravitational constant G.
  1. b) Assuming the mean density of the earth as 5500 Kg/m3 and that the earth’s radius as 6400 km, find a value for the acceleration of free fall at the earth’s surface. Derive the formula used.

(G = 6.7 x 10-11 Nm2 Kg-2)                                                    (7 + 2 ½ + 3 marks)

  1. Describe Quincke’s Method of finding surface tension. Derive the formula employed.
  2. Explain the production and detection of
  • Plane polarized light (3 ½ Marks)
  • Circularly polarized light (4 ½ Marks)
  • Elliptically polarized light (4 ½ Marks)
  1. Write about Miller indices. Explain the body centered cubic and face centered cubic crystal structures.

 

 

Go To Main Page

© Copyright Entrance India - Engineering and Medical Entrance Exams in India | Website Maintained by Firewall Firm - IT Monteur