Spr09 - "Grade or Education" = 1 CHEM 1002/01...

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"Grade or Education" = 1 CHEM 1002/01 Spring 09 Final Exam 1. Which of the statements below about ozone is CORRECT ? __ A. In one cycle a chlorine atom in the stratosphere destroys an ozone molecule and prevents another one from ever being created; a chlorine atom can undergo 100,000 cycles of ozone destruction and prevention during the time that it spends in the stratosphere. __ B. Ozone in the stratosphere is formed when NO x from automobile exhaust interacts with sunlight and molecular oxygen to generate oxygen atoms; the oxygen atoms then combine with oxygen molecules to make ozone molecules. __ C. Ozone in the stratosphere is bad, but ozone in the troposphere is good. __ D. Ozone in the troposphere helps prevent the sun's UV radiation from causing skin cancer. __ E. CFC is an acronym for carbofluorochlorines; these compounds destroy ozone in the troposphere. Rationale: Chapter 21 Problems 8, 18, 34, 38, 40 2. Which of the following statements about cyanide and carbon monoxide poisoning is CORRECT ? __ A. Cyanide poisons primarily by binding to hemoglobin oxidase in the blood. __ B. Carbon monoxide poisons by asphyxiation but cyanide does not. __ C. Carbon monoxide poisons primarily by binding to oxygen in the blood. __ D. The BEST medical antidote for carbon monoxide poisoning is thiosulfate. __ E. The antidote for cyanide poisoning is sodium thiosulfate. Rationale: Chapter 18 Problems 13, 15, 17, 20, 21 1
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3. Look at the structures shown below and the numbers beneath them which refer to them. Choose the statement which CORRECTLY matches a particular kind of organic compound with one of these structures. O C N H 2 NH 2 1 O C CH 3 O CH 3 2 5 O C CH 3 H CH 2 CH 3 NH 2 4 3 CH 2 CH 3 OH __ A. 3 is a carboxylic acid. __ B. 1 is an amine. __ C. 5 is an ester. __ D. 4 is an amine. __ E. 2 is an ether. Rationale: Chapter 14 Problem 10 4. Which of the following structural descriptions of molecules of various biochemicals is CORRECT ? __ A. Starch molecules are all polymers of β -D-glucose. __ B. Unsaturated fatty acid molecules have carboxylic acid groups attached to long straight hydrocarbon chains containing less than ten carbons with one or more carbon-carbon double bonds. __ C. Cellulose molecules are all branched polymers of β -D-glucose. __ D. Glycogen molecules are all branched polymers of α -D-glucose. __ E. An amino acid monomer molecule which can be used used to make a protein has a carboxylic acid group, an amino group, a hydrogen atom, and some other group all attached to different carbon atoms. Rationale: Chapter 15 Problems 4, 22, 23 5. Choose the CORRECT statement from the choices involving detecting pollutants in water. __ A. BOD measures water pollution directly by measuring the amount of oxygen which is consumed by hazardous bacteria contaminating the water sample. __ B.
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Spr09 - "Grade or Education" = 1 CHEM 1002/01...

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