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Code.No: 33008 SET-1 R05 JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD II.B.TECH – I SEMESTER SUPPLEMENTARY EXAMINATIONS NOVEMBER, 2009 ORGANIC CHEMISTRY (CHEMICAL ENGINEERING) Time: 3hours Max.Marks:80 Answer any FIVE questions All questions carry equal marks – – – 1. Give reasons for the following statements by quoting proper illustrations. a] Chloroacetic acid is stronger than acetic acid. b] Aniline is less basic than methyl amine. [8+8] 2.a] What are electrophiles? How are they classified? b] How are the following electrophiles generated? Give an account of the mechanism of their aromatic substitution. ??? a] CH b] CHCL C] CH-C= 0 [4+12] 3 2 3 – 3.a] What is aldol condensation? How is cl different from Beckmann rearrangement? [2+4] b] Explain the mechanism of acid catalyzed and base catalyzed aldol condensation. [5+5] 4.a] What are free radicals? What is their significance? How are they generated? b] Give an account of the addition of HBr to propylene in the presence of uv light. [8+8] 5. Explain the following terms with suitable examples. a] Optical isomers b] enantioners c] geometrical isomers d] conformational isomers. [4+4+4+4] 6. Differentiate the following with suitable illustrations. a] Addition polymerization from condensation polymerization. …