LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – PLANT BIOLOGY & BIOTECHNOLOGY

AD 04

THIRD SEMESTER – NOV 2006

CH 3102 – CHEMISTRY FOR BIOLOGISTS – THEORY

(Also equivalent to CHE 102)

 

 

Date & Time : 28-10-2006/9.00-12.00      Dept. No.                                                       Max. : 100 Marks

 

 

 

PART – A

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

1. Draw the structure of CsCl and label it.
2. Write any four postulates of VSEPR theory.
3. Write the IUPAC nomenclature for the following compounds
   a) [Cr(NH₃)₆]Cl₃             b) K[Ag(CN)₂]
4. Define the following terms.
   a) Molality b) mole fraction.
5. What is the principle of volumetric analysis?
6. Write the rate of the following reaction
   2NO_(g) + 2H_2(g) à N_2(g) + 2H₂O_(g)
7. What is peptization?
8. ‘p-nitrophenol is more acidic than phenol.’ Why?
9. Differentiate resolution and raecemization.
10. How is nylon-66 prepared?

 

PART – B

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

11. Discuss the shape of PCl₅ and BF₃ based on VSEPR theory.
12. Explain the types of hydrogen bonding with examples.
13. Discuss the primary and secondary standards.
14. Explain any two theories of acids and bases.
15. Derive the rate expression for a second order reaction 2A à
16. Explain the role of enzyme as catalyst in chemical and biochemical reactions.
17. Discuss the optical and kinetic properties of colloids.
18. Draw the resonance structure of the following
    a) nitrobenzene b) phenol.
19. Explain any two methods of resolution of racemic mixtures.
20. Write short notes on
    a) enantiomers b) chirality        c) meso compound             (2 + 1.5 + 1.5)
21. Draw the structure of the monomers used to prepare the following polymers.
    a) polypropylene b) polyvinyl chloride   c) Teflon          d) buna-S
22. Discuss the different types of polymers.

 

PART – C

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

 

23. a) Describe the shape of IF₇ using VSEPR theory.
    b) Discuss geometrical and optical isomerism in coordination compounds with an example for each. (4+6)
24. a) Write a note on dipole-induced dipole interaction.
    b) Derive the Henderson equation of buffer solutions. (4+6)
25. a) Discuss any two methods of determining order of the reaction.
    b) Define the terms homogeneous and heterogeneous catalyst with one example for each. (6+4)
26. a) Derive the half-life period of first order kinetics of a reaction.
    b) Discuss the applications of colloids. (5+5)
27. a) Write the order of acidity of the following CH₃COOH, CCl₃COOH, CF₃COOH b) Write the order of basicity of the following NH₃, R-NH₂, R₂NH, R₃
    c) Explain the optical activity of lactic acid. (2+2+6)
28. a) Discuss the methods used to differentiate geometrical isomers.
    b) Explain the mechanism of chain growth polymerization. (5+5)

 Go To Main Page      

  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

11. Derive Henderson equation for basic buffer.
12. What are the factors affecting the rate of the reaction?
13. Derive the rate expression for the reaction A®
14. What are the requirements of a primary standard?
15. Explain the structure of SF₆ using hybridization.
16. Explain Electrophoresis with a diagram.
17. Draw and explain the crystal structure of NaCl.
18. Explain the process of vulcanization of rubber in detail.
19. Give reasons for the increase in acidity of the following:
20. Propionic acid < acetic acid < formic acid
21. a-Chloropropionic acid > b- chloropropionic acid

 

 

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

Part C

Answer any four questions.                                                                                 4X10=40

 

23. Explain the geometrical and optical isomerism in octahedral complexes with one example for each.
24. Explain the hybridization of IF₇ and XeF₆ using VSEPR theory.
25. a) Describe any two methods for determining the order of a reaction.
26. b) What is inter- and intramolecular hydrogen bonding? Explain with examples.
27. Mention the differences between
28. a) Coagulation and peptisation
29. b) Lyophilic and lyophobic colloids
30. a) Explain electro osmosis with a diagram.
31. b) Draw and explain the crystal structure of CsCl.
32. How are the following polymers manufactured?
33. a) Nylon b) Terylene c) bakelite                    d) PVC

 

 

Go To Main page

 

 

LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

DB 04

B.Sc. DEGREE EXAMINATION – ADV.ZOOLOGY&PLANT BIO & BIOTECH

THIRD SEMESTER – November 2008

CH 3104/CH 3102 – CHEMISTRY FOR BIOLOGISTS – I

 

 

 

Date : 11-11-08                     Dept. No.                                        Max. : 100 Marks

Time : 9:00 – 12:00

PART – A

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

1. Define ionization energy.
2. What is dipole-induced dipole interaction?
3. Why do ionic compounds usually have high melting points?
4. Calculate the pH of a solution whose H⁺ ion concentration is 0.5 mol/litre.
5. What is hybridization? Give an example.
6. Differentiate between order and molecularity.
7. What is peptisation?
8. Why is chloroacetic acid stronger than acetic acid?
9. What is chiral carbon? Give an example.
10. Arrange the following in the increasing order of basicity:

1. a) NH­₃ b) CH₃NH₂ c) (CH₃)₂NH             d) (CH₃)₃N

PART – B

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

1. What are the factors influencing the formation of ionic bond?
2. Discuss the optical isomerism in octahedral complexes with examples?
3. What are hydrogen bonds? How are they classified? Cite an example for each type.
4. Write briefly about homogeneous and heterogeneous catalysis with examples.
5. Derive the dissociation constant for weak acid.
6. Explain the characteristics of a primary standard substance.
7. Explain the kinetic and optical properties of colloids.
8. What is resonance? Discuss the resonance structure of the following:

1. a) phenol b) nitrobenzene

1. Discuss the application of colloids.
2. Explain the structure of BF₃ and NH₃
3. What are enantiomers and diasteriomers? Give an example.
4. a) Define normality.

5. b) What is the normality of solution containing 5.3g of NaOH in 250 mL.

 

PART – C

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

 

23. Discuss the postulates of Werner’s theory.
24. Write short notes on a) Electrophoresis b) Electro osmosis
25. Derive the rate expression for a second order reaction 2A® products.
26. How are the following polymers manufactured?

(a) Nylon-6,6            (b) Teflon               (c) PVC          (d) Buna-S

27. Explain any two methods of separation of racemic mixture.
28. Explain postulates of VSEPR Theory. Predict the geometries of IF₇, CH₄ and PCl₅

using VSEPR theory.

 

Go To Main Page

 

LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – CHEMISTRY

FOURTH SEMESTER – APRIL 2011

CH 4204 / 4202  – CHEMISTRY FOR BIOLOGISTS – II

 

 

Date : 05-04-2011              Dept. No.                                        Max. : 100 Marks

Time : 1:00 – 4:00

 

PART-A

      Answer ALL the questions                                                                                            (10 x 2 = 20)

1. How is glycine synthesized from serine?
2. What is peptide bond? How is it formed?
3. Write any two properties of lipids.
4. What are steroids? Give an example
5. What are the different types of RNA? Mention their functions.
6. What is mutation?
7. What are epimers? Give example.
8. Write down the biological importance and functions of carbohydrate.
9. What is ADP? Draw its structure.
10. What are herbicides? Give an example.

 

PART – B

      Answer any EIGHT questions                                                                         (8 x 5 = 40)

11. Discuss the primary structure of protein.
12. How are enzymes classified? Give an example for each.
13. What are essential and non-essential amino acids? Draw the structures of any three amino acids.
14. Discuss the following a) Lecithins b) Cephalins      and     c) plasmologens
15. Discuss the replication of DNA.
16. Draw and discuss the structure of RNA.
17. Write a note on a) mutarotation        b) Inversion of cane sugar
18. Explain the first five steps in the process of conversion of glucose to pyruvic acid.
19. Draw the Fischer and Haworth structure of D-Fructose.
20. Draw the structure of sucrose. Discuss its non-reducing property.
21. What is BHC? Write down its preparation and uses.
22. Describe the manufacture of superphosphate of lime.

 

 

 

 

PART – C

Answer Any FOUR questions                                                                                 (4 x 10 = 40)

23. Discuss Edman and Sanger’s methods to determine the N-terminal sequence of amino acid.
24. a) Write in detail the classification of proteins based on solubility and structure. (8)
25. b) What is meant by hydrogenation of oil? (2)
26. Discuss the biosynthesis of cholesterol. (10)
27. a) Write a brief note on genetic engineering. (5)
28. b) Write the differences between DNA and RNA. (5)
29. Explain the complete changes that occur during one complete turn of the citric

acid cycle. (TCA Cycle)  (10)

28. Discuss the following with structures (10)
29. Papaverine b) Nicotine        c) Coniine      d) Camphor

 

Go To Main Page

 

 

 

 

 

LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – CHEMISTRY

FOURTH SEMESTER – APRIL 2012

CH 4204 – CHEMISTRY FOR BIOLOGISTS – II

 

 

Date : 19-04-2012              Dept. No.                                        Max. : 100 Marks

Time : 1:00 – 4:00

 

 

Part- A

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

1. What is a dipeptide? Give an example.
2. Define isoelectric point of an amino acid
3. Draw the structure of fructose.
4. What are fungicides? Give any two examples.
5. Give the compositions of NPK fertilizers.
6. What are isomerases? Give an example.
7. Give an example for the optical specificity of an enzyme.
8. Define iodine value of a fat.
9. What are PUFA? Give any two examples.
10. Draw the structure of papavarine and citral.

Part – B

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

11. Discuss in detail the primary structure of proteins.
12. Give any two methods of synthesis of amino acids.
13. How will you convert a hexose into  pentose?

1. Give a brief over view of Citric acid cycle.

15. What are fertilizers? List the importance of the fertilizers.
16. How are the following synthesized?

(a) 2,4-D          (b) 2,4,5-T

17. Explain the process of transcription in brief.

1. What are coenzymes? Explain the significance of coenzymes in enzyme action.
2. Mention the difference between plant and animal fats.
3. Define rancidity of a fat? What are the two types of rancidity? Explain.
4. What are lecithins and cephalins? Explain.
5. Explain the factors affecting the enzymatic activity.

 

 

Part-C

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

23. Discuss the classification of proteins based on their function.
24. Describe in detail the different types of soil
25. List the uses of insecticides. Give the method of synthesis of the following
26. a) DDT b)   BHC    c)  Organophosphates                                    (3+4+3)
27. What is enzyme inhibition? Discuss competitive and non-competitive inhibitions with examples.
28. a.) Explain the classification of lipids with examples.

b.) Discuss the classification of alkaloids.

28. Draw and explain the double helical structure of DNA.

 

Go To Main page

 

 

LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – PLANT BIOLOGY & ADV. ZOOLOGY

THIRD SEMESTER – APRIL 2012

CH 3104 – CHEMISTRY FOR BIOLOGISTS – I

 

 

Date : 28-04-2012              Dept. No.                                        Max. : 100 Marks

Time : 9:00 – 12:00

 

Part A

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

 

1. What is intermolecular hydrogen bonding? Give an example.
2. Why the bond angle of water is reduced to 104° when compared with the normal tetrahedral angle?
3. Calculate the pH of 0.001N HCl.
4. Define the rate of a reaction.
5. Mention any two differences between order and molecularity.
6. Give any two examples for enzymes used in industries.
7. Draw the resonance structures of phenol.
8. Define Brownian movement.
9. How is maleic acid differentiated from fumaric acid?
10. Why is chlorophenol more acidic than phenol?

 

Part B

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

 

11. Explain the hybridization and shape of PCl₅.
12. State the postulates of Werner’s theory of coordination compounds.
13. Draw the structure of chlorophyll and explain any three functions.
14. Explain any five requirements for a primary standard solution.
15. Differentiate homogeneous and heterogeneous catalysis with examples.
16. Derive an expression for the rate constant of a first order reaction.
17. What is peptisation? Explain with an example.
18. Explain any two methods for the separation of a racemic mixture.
19. Discuss the optical isomerism of lactic acid.
20. Explain the types of polymerization with an example for each.
21. What is electro-osmosis? Explain.
22. Explain the vulcanization of rubber in detail.

 

 

 

 

Part C

Answer any FOUR questions.                                                                                     (4 x 10 = 40 Marks)

 

23. Explain the optical isomerism in square planar and octahedral complexes.
24. What are buffer solutions? Derive Henderson equation for an acidic buffer.
25. Explain electrophoresis in detail.
26. Define steric acceleration and steric hindrance. Explain with an example for each.
27. How are the following prepared?
28. i) nylon ii) terylene iii) neoprene                iv) PVC
29. Explain in detail the optical isomerism of tartaric acid.

 

Go To Main page

 

 

LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – PLANT BIOLOGY & ADV. ZOOLOGY

FIRST SEMESTER – NOVEMBER 2012

CH 1100 – CHEMISTRY FOR BIOLOGISTS – I

 

 

Date : 03/11/2012             Dept. No.                                        Max. : 100 Marks

Time : 1:00 – 4:00

 

 

 

Part – A

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

1. Define relative error.
2. Why TLC is superior to paper and column chromatography?
3. What are adsorbents? Give an example.
4. What is intermolecular hydrogen bonding? Give an example.
5. What is dipole – dipole interaction?
6. What are hormones?
7. Define normality?
8. What is enzyme catalyst?
9. Give the source and deficiency of vitamin A.
10. Draw the structure of vitamin E.

 

Part – B

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

11. Mention five points of handling of acids.
12. Explain the factors affecting R_f
13. Discuss the crystal structure of CsCl.
14. What are the factors involving the formation of ionic bond?
15. Discuss the hybridization and geometry of CH₄ and H₂
16. List the postulates of Werner’s theory.
17. Discuss the geometrical isomerism of octahedral complexes.
18. Give the difference between molecularly and order.
19. Discuss the occurrence and composition of fats.
20. What is the biological effects and thyroid hormones?
21. Explain the mechanism of acid buffer.
22. What are secondary standard solutions and how are they standardised?

 

 

 

 

Part – C

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

23. What are the prerequisites for choosing adsorbents?
24. Describe the three types of adsorbents with suitable example.
25. a) Discuss the optical isomerism of octahedral complexes.(7)
26. b) What are polydentate ligands? Give an example. (3)
27. a) What is rate law? Derive the rate expressions for I order reactions.(5)
28. b) What are the prerequisites for the preparation of primary standard solutions?(5)
29. What is catalyst? Explain homogeneous and heterogeneous catalyst with suitable example.
30. Explain in detail the structure and function of vitamin A, C, D, K and E.

 

 

Go To Main Page

LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – PLANT BIOLOGY & ADV. ZOOLOGY

THIRD SEMESTER – NOVEMBER 2012

CH 3104 – CHEMISTRY FOR BIOLOGISTS – I

 

 

Date : 07/11/2012             Dept. No.                                        Max. : 100 Marks

Time : 9:00 – 12:00

 

SECTION – A

Answer all the questions:                                                                                                               10 × 2 = 20

1. Mention any four important properties of ionic compounds.
2. Define molarity.
3. What is the biological significance of hemoglobin?
4. What is a buffer solution?
5. State rate law.
6. Give any two examples for zero order reaction.
7. What are lyophilic colloids? Give an example.
8. Mention two applications of colloids in medicine.
9. How is nylon-6,6 prepared?
10. Draw the resonance structure of aniline.

SECTION – B

Answer any eight questions:                                                                                                            8 × 5 = 40

11. Write a note on dipole-induced dipole interaction.
12. Explain the various factors affecting the formation of ionic bond.
13. Describe the geometrical isomerism in square planar complexes.
14. Calculate the normality and molarity of a solution of H₂SO₄8 g/l.
15. Explain the buffer action using acidic buffer.
16. Differentiate homogeneous catalysis from heterogeneous catalysis.
17. Derive an expression for the first order rate equation.
18. What is electro osmosis?
19. Explain coagulation?
20. Explain the types of polymerization with an example for each.
21. How will you convert natural rubber into hard rubber?
22. What is mesomeric effect? Explain.

SECTION – C

Answer any four questions:                                                                                                          4 X 10 = 40

23. a) Draw the crystal structure of NaCl and explain.
24. b) What is meant by hybridisation?                       (6+4)
25. What are primary and secondary standard solutions? Explain the important characteristics of a primary standard solution.
26. a) Explain Michaelis – Menten equation.
27. b) What are catalytic poisons? (8+2)
28. Explain the optical and kinetic properties of colloids.
29. a) Describe the optical isomerism exhibited by tartaric acid.
30. b) What are polydentate ligands? Give an example. (7+3)
31. a) Mention the differences between HDPE and LDPE
32. b) What are homo and co polymers? Give an example for each type. (5+5)

 

Go To Main Page