JNTU
JNTU B.Pharmacy II PHARMACEUTICAL ORGANIC CHEMISTRY-II Previous Question Paper (May/June- 2019 - R17)
Note: This question paper contains two parts A and B. Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit. Each question carries 10 marks and may have a, b, c as sub questions.
PART- A (25 Marks)
What is Huckel’s rule?
Answer
Huckel's rule states that for a planar, cyclic, fully conjugated system to be aromatic, it must contain (4n + 2) π-electrons, where n is an integer (n = 0, 1, 2, ...).
Write the structure and uses of DDT.
Answer
DDT (Dichlorodiphenyltrichloroethane) consists of two chlorophenyl rings attached to a central carbon atom, which is also bonded to a hydrogen atom and a trichloromethyl group. It is primarily used as a potent insecticide for controlling malaria and typhus by killing mosquitoes and lice.
Write the uses of naphthols.
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How are aromatic amines prepared?
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What is acid value?
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What is Reichert Meissl (RM) value? Write its significance.
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Write the products formed on oxidation of naphthalene.
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Write the medicinal uses of derivatives of triphenylmethane.
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Write one method of preparation of cycloalkanes.
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Write any two reactions of Cyclopropane.
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PART-B (50 Marks)
Write the mechanism of nitration of benzene.
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Describe the influence of substituents on the reactivity of mono-substituted benzene?
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Write the mechanism of Friedel-Craft’s acylation. What are its merits?
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Write the structure and uses of Saccharin and chloramines.
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How is the acidity of phenols affected by substituents.
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Write the mechanism and uses of Reimer-Tieman reaction.
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How are phenols prepared in the laboratory?
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What is Sandmeyer’s reaction? Write its applications.
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What do you know about Saponification value and its significance.
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What are the methods of hydrolysis and hydrogenation of fats and oils?
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What do you know of about drying oils and their uses.
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Write the Iodine value and acetyl value.
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How is naphthalene prepared?
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Write the reactions of phenanthrene.
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How is anthracene prepared?
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Write the reactions of naphthalene.
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Write the reactions of cyclobutane.
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What are the limitations of Baeyer’s Strain theory?
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What is Sachse Mohr’s theory? Write its merits.
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Write the reactions of cycloalkanes?
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