<p>Sample Final Exam [200 points] WINONA STATE UNIVERSITY Spring 2006</p><p>Name: ______Signature: ______</p><p>Multiple Choice: For each of the following questions, write the letter of the best answer in the space provided. And mark the answer on the Scantron provided. Return both the exam and the Scantron. NOTE: The actual Final Exam will have 40 multiple choice questions.</p><p>1. To remove small concentrations of non-ionic pollutants, drinking water is passed through ______. (a) water softener (b) activated charcoal (c) sand (d) ionic exchanger</p><p>2. The three most important elements that plants receive from the soil through the roots as ions are ______. (b) Nitrogen, phosphorus, and carbon (c) Nitrogen, phosphorus, and potassium (d) Nitrogen, oxygen, and potassium (e) Carbon, oxygen, and hydrogen</p><p>3. Fresh water can be made form seawater through a process called ______. (a) Osmosis (b) Aeration (c) Reverse osmosis (d) Oxidation</p><p>4. Which are the most abundant gases in the atmosphere? ______(a) Nitrogen and oxygen (b) Nitrogen and neon (c) Carbon dioxide and nitrogen (d) Water and neon</p><p>5. The atmospheric layer in which is found the air we breathe is ______. (a) troposphere (b) mesosphere (c) stratosphere (d) thermosphere</p><p>6. The phrase “acid rain” applied to rain water with a pH of ______(a) less than7 (b) less than 8 (c) less than 5.6 (d) higher than 9</p><p>7. Why must the ozone layer in the stratosphere be protected? ______(a) Ozone poisons living organisms. (b) Ozone absorbs incoming ultraviolet light. (c) Ozone burns up pollutants. (d) Ozone prevents oxygen from escaping the earth.</p><p>8. Two acids found in acid rain are ______. (a) Nitric acid and phosphoric acid (b) Sulfuric acid and nitric acid (c) Phosphoric acid and acetic acid (d) Carbonic acid and acetic acid</p><p>9. Which of the following pollutants does not contribute to acid rain? ______(a) SO2 b) CH4 c) NO2 Page 1 of 2</p><p>10. Acid rain contributes to which of the following problems? ______(a) Dead lakes where fish cannot survive (b) Damage to forests (c) Leaching of metal ions into groundwater (d) All of the above</p><p>11. Which is not necessary for photochemical smog? ______(a) SO2, sulfur dioxide (b) sunlight (c) ozone (d) NO2, nitrogen dioxide</p><p>12. Which is the secondary pollutant in photochemical smog? ______(a) Ozone, O3 (b) Nitrogen, N2 (c) Hydrocarbon (d) Nitrogen monoxide (nitric oxide), NO</p><p>13. A secondary pollutant ______. (a) is less destructive than a primary pollutant. (b) causes destruction on buildings but not on human beings. (c) is produced by chemical reactions involving primary pollutants in the air. (d) has a shorter lifetime in the atmosphere than that of a primary pollutant.</p><p>14. In a photochemical reaction to form a photochemical smog, ______. (a) the chemical reaction is energized by light. (b) ozone is formed. (c) nitrogen dioxide is formed. (d) All of the above</p><p>Page 2 of 2</p>