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Pune University - SY BSc (Sem - I) CHEMISTRY - II, April 2010

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Total No. of Questions : 4] [Total No. of Pages : 2 [3717] - 106 P263 S.Y. B.Sc. CHEMISTRY CH - 212 : Organic Chemistry (Paper - II) (Sem. - I) (21321) (New Revised Syllabus) Time : 2 Hours] Instructions to the candidates : 1) All questions are compulsory. 2) Figures to the right indicate full marks. 3) Draw structures and diagrams if necessary. [Max. Marks : 40 Q1) Answer the following : [10] a) Define meso compound. b) How will you prepare oxime from acetaldehyde? c) Give preparation of benzoic acid from toluene. d) Give any one method of preparation of aniline. e) Give use of biochemistry in Agriculture. f) What is action of acetic anhydride in presence of ZnCl2 on Glucose? g) Draw structure of Ls-Proline. h) Give classification of lipids. i) Pyrrole is very weak base, explain. j) Draw structure of sugare present in DNA. Q2) a) Assign the structures to (A) and (B) in the following reactions : (any three) [6] OH K 2 Cr 2 O 7 2 (A) (B) H 2 SO 4 i) ii) NH OH Cl5 CH3 COOH P (A) NH3 (B) NH2 + NaNO 2 HCl H2O H (A) (B) iii) NO2 P.T.O. 0%NaOH iv) 2CH3 CHO 1 (A) (B) O v) b) Ni CH3 CH2 C H NH3 (A) H2 (B) How will you bring about the following conversions? i) Nitrobenzene into phenol. ii) [4] Acetaldehyde into 2 propanol. iii) Methyl bromide into acetamide. Q3) Attempt any two of the following : a) [10] Give Haworth synthesis of Naphthalene. What is action of the following reagents on furan? i) SO3 / pyridine. ii) H2/Ni, 200 - 250oC. iii) CHCl3 / KOH. b) What are monosaccharides? Explain formation of ring in D-glucose and add a note on mutarotation in D-glucose. c) What are lipids? Give any three functions of lipids. Write structure of -Carotene. Q4) a) Attempt any two of the following : [6] i) What are enzymes? Discuss the classification of enzymes with suitable examples. ii) How is acetophenone prepared from benzene? Give action of the following reagents on acetone. 1) HCN. 2) NH2 NH Ph. iii) What are proteins? Give classification of proteins with one example each. What is angle strain? Explain it s effect on stability of cycloalkanes.[4] OR Give important features of Watson-crick model of DNA and state it s importance. b) [3717] -106 2

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Additional Info : S.Y. B.Sc. Chemistry (Semister - I), CH - 212 : Organic Chemistry (Paper - II) (New Revised Syllabus), Pune University
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