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PracticeExam1 - Practice for the first hourly examination...

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Practice for the first hourly examination in BISC 220 January 2006 Answers are given for about half of the questions. Answers to the remaining questions are available in the text. The following 28 multiple choice questions are worth 3 points each. Please CLEARLY write your answer in the left hand margin box. 1. Using the information in the abbreviated periodic table ( above ), how many neutrons does the nucleus of a nitrogen atom contain? a. 2 b. 7 c. 8 d. 14 e. 21 2. When two atoms are equally electronegative, they will interact to form 3. What do cohesion, surface tension, and adhesion have in common with reference to water? bonding. 4. The figure above shows a solute molecule surrounded by a hydration shell of water. Based on your knowledge of the polarity of water, the solute molecule is most likely 5. Assume that acid rain has lowered the pH of a particular lake to pH 5.0. What is the hydroxide ion concentration of this lake? a. 1 x 10 -5 mol of hydroxide ion per liter of lake water b. 1 x 10 -9 mol of hydroxide ion per liter of lake water c. 5.0 M with regard to hydroxide ion concentration d. 9.0 M with regard to hydroxide ion concentration e. Both B and D are correct.
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6. Air temperature often increases slightly as clouds begin to drop rain or snow. Which behavior of water is most directly responsible for this phenomenon? 7. Recent research suggests that side effects from Ritalin, the drug used to treat attention deficit disorder, may be caused by contamination of enantiomers, or molecules that
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