AUGUST 2008

AUGUST 2008 - SECTION A. Answer ALL questions. (40%) 1)...

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SECTION A. Answer ALL questions. (40%) 1) Identify the organic compounds (Alkene, Alcohol or Aldehyde) shown in the following infrared spectrogram: (6 marks) b. c. 1 a.
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2) Describe how you can distinguish between the following pairs of compounds by using a simple chemical test i. Ethanol and methanol. (3 marks) ii. Butan-2-ol and Ethoxyethane (3 marks) 3. Distinguish between Reversible and Irreversible Processes (6 marks) 4. Name the following by the IUPAC system nomenclature a) O CH 3 CH 2 CHCH 2 CH 2 COH (2 marks) CH 3 b) OH (2 marks) 5) Draw the following from the IUPAC name: a. trans - 1,4- Dimethylcyclohexane (3 marks) b. 3-Methyl 3-Hexanol (3 marks) 6) Complete the equation for the following reactions: a. (3 marks) b. O R O-H + NaOH (3 marks) 2
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c. (1) KMnO 4, OH - CH 3 heat (2) H 3 O + (3 marks) H 3 C-Br Mg Ether (3 marks) SECTION B: Answer any THREE questions. (60%) 1. a). Explain how Ionic and Covalent bonds are formed. Give examples with diagrams to illustrate your answer. (10 marks) b). Discuss how the nature of the bond affects the properties of the bond and the substances. (10 marks) 2. Discuss on the formation of Primary alcohols with necessary equations and explain the process of oxidation of primary alcohols and the practical problems faced during the process along with the method of rectification. (20 marks) 3. What is an Infrared Spectrometer. With necessary diagram explain the functioning of the Infrared Spectrometer followed by the interpretation of results for finding an unknown compound. (20 marks) 4. Discuss in detail on the relevance of first and second law of Thermodynamics related to energy transfer along with necessary diagrams. (20 marks) 3
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SECTION A 1. a. Alkene (2 marks) b. Aldehyde (2 marks) c. Alcohol (2 marks) 2. i). Ethanol gives positive result to the triiodomethane test, forming a yellow precipitate. Methanol does not give a yellow precipitate in the same test. (3 marks) ii). Add phosphorus pentachloride. Butan-2ol gives off white fumes No fumes are given off by ethoxyethane. (3 marks) 3. Reversible process is a process that can be reversed without leaving any trace on the surroundings the system and the surrounding are returned to their initial state net work and heat exchange between process and surrounding is zero for the combined process (3 marks) Irreversible process is a process that cannot be reversed due to Friction Unrestrained expansion of a gas Heat transfer (3 marks) 4. a. 4-Methylhexanoic acid (2 marks) b. Phenol (2 marks) 5. a. or
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This note was uploaded on 06/06/2011 for the course CHEM 3040 taught by Professor Reddy during the Spring '10 term at Taylor's.

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AUGUST 2008 - SECTION A. Answer ALL questions. (40%) 1)...

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