chem 121 practice exam chapters 1-4

chem 121 practice exam chapters 1-4 - DISCLAIMER: This is...

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DISCLAIMER: This is the practice exam for the material covering Chapters 1- 4. This should be completed AFTER you complete all the homework problems. If you use this as your only means of studying you will be lucky to get a D on the real exam. This was put together to give you a feel of the timeframe you will be working under. You will have an hour and 18 min to complete the exam, which will include a periodic table, solubility rules, and the activity series. Good Luck Also,the answers for this practice exam will NOT be posted. 1. [6 points] Which of the following statements is true? (a) Air is an element (b) Air is a compound (c) Air is a heterogeneous mixture (d) Air is a homogeneous mixture (e) Air is a pure substance 2. [6 points] Which of the following is not the correct pairing of the symbol and name of an element? (a) B, Boron (b) K, Krypton (c) Cu, Copper (d) O, Oxygen (e) Ti, Titanium 3. [6 points] The two instruments used to measure the volume of a liquid in experiment #1 were: (a) pipet and barometer (b) spectroscope and centrifuge (c) pH meter and thermometer (d) pipet and buret (e) buret and Bunsen burner 4. [6 points] What is the empirical formula of the ionic compound that forms between calcium and iodine? (a) Ca 3 I 2 (b) Ca 2 I (c) CaI (d) CaI 2 (e) None of the above
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5. [6 points] What is/are the product(s) in a COMBUSTION reaction? (a) salt + water (b) a precipitate (c) carbon dioxide + water (d) a hydrocarbon and oxygen (e) acid + base 6. [6 points] The following reaction is an example of a __________ reaction. Na 2 SO 4 + Pb(NO 3 ) 2 PbSO 4 + 2NaNO 3 (a) Combustion (b) Metathesis (c) Combination (d) Dissociation (e) Displacement 7. [6 points] Which of the following pairs of atoms (ions) have the same number of neutrons? (a) 65 Zn 2+ and 67 Ge (b) 87 Sr 2+ and 83 Kr (c) 16 O 2- and 19 F (d) 57 Fe 3+ and 55 Fe 2+ (e) None of the above pairs have the same number of neutrons 8. [6 points] What is the empirical formula of potassium sulfite? (a) PSO
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chem 121 practice exam chapters 1-4 - DISCLAIMER: This is...

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