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Name of the University : The Tamilnadu Dr. M.G.R. Medical University
Degree : B.Pharm
Subject Code/Name : 4252/Pharmaceutical Organic Chemistry
Year/: I
Paper : II
Document Type : Question Bank
Website : web.tnmgrmu.ac.in

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TNMGRMU Pharmaceutical Organic Chemistry Question Bank

Time : Three hours
Maximum : 80 marks

Related / Similar Question Paper : TNMGRMU B.Pharm Pharmaceutical Inorganic Chemistry Question Bank

February 2011

[KY 758]
Sub. Code : 4252
FIRST B. PHARM. DEGREE EXAMINATION.
(Regulations 2009) Candidates Admitted from 2009-2010
Paper II : PHARMACEUTICAL ORGANIC CHEMISTRY
Q.P. Code : 564252
Time : Three hours
Maximum : 80 marks
I. Essay questions: Answer any TWO questions. (2 x 20 = 40)
1. (a) Define aromatic electrophlic substitution reactions. Discuss the reaction and mechanism of nitration sulphonation, and friedel-craft reaction, sulphonation, and friedel-craft reaction. (15)
(b) Describe clemmenser reduction with suitable example (5)
2. (a) Define elimination reaction. Discuss the mechanism of E1 and E2 reaction with suitable example. (10)
(b) Write any four general methods of preparation of alkyl halides. (10)
3. (a) Discuss Bayer’s strain theory with suitable examples. (10)
(b) Explain the facts supporting kekule structure of Benzene. (10)
II. Write short notes: Answer any SIX questions. (6 x 5 = 30)
1. Write short note on peroxide effect.
2. Explain nucleophilic substitution reaction with example.
3. Write the preparation and synthetic utility of diazanium salts.
4. Outline the general methods of preparation of alkynes.
5. Discuss the basicity of amines.
6. Write note on Inductive effect.
7. Write note on free radical reaction.
8. Write any two method of preparation of alcohol.
III. Short answers: Answer any FIVE questions (5 x 2 = 10)
1. Tollens reagent.
2. Define hyper – conjugation.
3. Explain conjugated dienes.
4. Explain resonance effect.
5. Lucas test.
6. Give the structure for 5-Bromo-4-methyl-hex-3-en-2-one.
7. Give the IUPAC name for Ho -CH2 -CH2 – COOH.

August 2011

I. LONG ESSAYS (2 x 20 = 40)
1. Give the preparation and reactions of Alkenes.
2. Explain the mechanism involved in Nucleophilic aromatic substitution reaction.
II. SHORT NOTES (8 x 5 = 40)
1. Explain the Bayers strain theory.
2. Write the preparation of alkyl halides.
3. Write short notes on Markownikoff’s rule.
4. What is diel’s alder reaction?
5. Explain the Huckel’s rule.
6. Give a note on carbocations.
7. How to differentiate primary, secondary and tertiary alcohols.
8. Write the preparation and the synthetic utility of Grignard reagent.
III. SHORT ANSWERS (10 x 2 = 20)
1. Define dipole moment and resonance.
2. Give the medicinal uses of (a) Methyl salicylate (b) acetanilide.
3. Write any two addition reaction of conjugated dienes.
4. What are nucleophiles and electrophiles?
5. What is energy of activation?
6. Write the ozonolysis reaction.
7. Write the two steps of SN1 mechanism.
8. What is sand Meyer Reaction?
9. What are epoxides?
10. How to prepare diazonoium salts?

February 2012

I. Elaborate on: (2 x 20 = 40)
1. (a) Give the structure nomenclature, preparation and reaction of Cycloalkanes.(10)
(b) Add a note on addition reactions of conjugated dienes. (5)
(c) Explain the formation of bonding, anti-bonding orbitals. (5)
2. (a) What is kekule structure of benzene and write their resonance structure of Benzene. (7)
(b) Explain the SN2 reaction with the help of a suitable example. (8)
(c) Outline the test for purity, preparation and medicinal uses of saccharin. (5)
II. Write notes on: (8 x 5 = 40)
1. What is the diazonium reaction? Explain the general reaction?
2. Write the synthesis and properties of phenanthrene.
3. Explain keto-enol tautomerism with examples.
4. Write the preparation, test for purity and medicinal uses of benzoic acid.
5. Explain the Bayer’s strain theory and its limitations.
6. Give the nomenclature and reactions of alkynes.
7. Explain the markovnikov’s rule including the mechanism and with an example.
8. What are Grignard reagent and explain with one example?
III. Short Answers (10 x 2 = 20)
1. Define intermolecular bonding.
2. Write the structure and uses of citric acid.
3. How will you test the purity of vanillin?
4. Define hyper conjugation.
5. What is energy of activation?
6. Explain the following reactions
(a) Sandmeyer reaction (b) Gattermann reaction.
7. What is Diens?
8. What are alkyl halides?
9. Write the preparation of malonic ester.
10. Explain bond fission.

February 2013

(180 Min)
I. Elaborate on: (2 x 2 0 = 40 marks)
1. Define the terms ‘Hybridization’.Explain various types of hybridization in carbon compounds with examples?
2. What are polynuclear aromatic hydrocarbons? Write the synthesis and properties of Diphenyl ethane, Phenanthrene and Naphthalene?
II. Write notes on: (8 x 5 = 40 marks)
1. Explain Williamson ether Synthesis and Riermticman reaction?
2. Explain the preparation of Glycerol?
3. Discuss cannizaro and crossed cannizaro reaction?
4. Write any two method of preparation of carboxylic acid with its mechanism?
5. Explain Bayer’s strain theory?
6. Give preparation,assay,use of Dimercaprol and Hexamine?
7. Give synthetic utility of diazonium salts?
8. Explain mechanism of Halogenation of alkanes.Discuss selectivity of halogens in this reaction?
III. Short Answers (10 x 2 = 20 marks)
1. Diel’s alder reaction?
2. Dipole moment?
3. Aromaticity of benzene?
4. Energy of activation?
5. Medicinal use of Mephensein and Benzyl benzoate?
6. Aniline with potassium permangante
7. Hoffmann degradation of amines?
8. How will distinguish 1,2 and 3 alcohol?
9. Tautomerism?
10. Explain Why Akynes are more reactive than alkenes?