CHAPTER 10. ANS: d. ANS: b. ANS: b. ANS: d. ANS: d
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1 CHAPTER Which one of the following will not combine with oxygen? a. nitrogen b. aluminum c. hydrogen d. helium 2. In the equation 2 Na(s) + Cl 2 (g) ---> 2 Na Cl -, the oxidizing agent is a. Na(s) b. Cl 2 (g) c. Na + d. Cl - 3. In the equation SnO 2 (g) + 2 C(s) ----> Sn(s) + 2 CO(g), what substance is the reducing agent? a. SnO 2 b. C c. Sn d. CO 4. Free radicals are particles that a. have an unpaired electron b. act as oxidizing agents c. grab another electron from a neighboring molecule d. all of the above 5. When a zinc strip is placed in a copper sulfate solution, a. the copper solution will lose its blue color b. the zinc will dissolve c. black crystals of copper atoms appear d. all of the above occur 145
2 6. Reducing agents a. gain electrons and get oxidized b. lose electrons and get reduced c. gain electrons and get reduced d. lose electrons and get oxidized 7. Antioxidant vitamins a. react with DNA b. donate electrons to free radicals c. are reduced d. form free radicals in the body 8. Which is not an example of a primary battery? a. lead-acid automobile battery b. alkaline battery c. mercury battery d. lithium battery 9. PbSO 4, Pb, and H 2 SO 4 are chemicals in a. dry cell b. primary battery c. salt bridge d. automobile battery 10. Which of the following is not a definition of oxidation? a. loss of electrons b. loss of hydrogen c. loss of protons d. addition of oxygen 146
3 11. Which of the following is not a definition of reduction? a. gain of electrons b. gain of protons c. gain of hydrogen d. loss of oxygen 12. Which equation does not fit the definition of oxidation? a. Ag + + e > Ag b. C 2 H 6 ---> H 2 + C 2 H 4 c. C + O > CO 2 d. Na > Na + + e 13. Which of the following is a reduction of carbon? a. C + 2 H > CH 4 b. C + O > CO 2 c. 2 C + O 2 ---> 2 CO d. C > C e 14. Which of the following is not necessary for corrosion of iron? a. iron b. water c. light d. oxygen 15. Which of the following might prevent corrosion of iron? a. a water spray b. a coating of zinc c. acid treatments d. salt solutions 147
4 16. Charge is transported from place to place in a battery by a. an anode b. a cathode c. the migration of ions d. an external electrical circuit 17. A battery which may be recharged is called a(n) a. primary battery b. dry cell c. electroplating cell d. secondary battery 18. In a lead storage battery, what lead compound is formed at both the cathode and the anode during discharge? a. lead oxide (PbO 2 ) b. lead chloride (PbCl 2 ) c. lead sulfate (PbSO 4 ) d. lead oxide (PbO) 19. In a fuel cell using oxygen as the oxidizer and hydrogen as the fuel, what is the overall cell reaction? a. H 2 O > H 2 + O 2 b. 2 H 2 + O > 2 H 2 O c. H 2 O + 4 e > 2 H OH d. O H e > 2 H 2 O 20. In the electrolysis reaction, oxidation occurs at which electrode? 148
5 a. cathode b. anode c. both electrodes d. neither electrode 21. Which of the batteries listed below is a reusable battery? a. dry cell battery b. mercury battery c. alkaline battery d. lead storage battery 22. Which of the batteries listed below is a primary battery? a. lithium ion battery b. alkaline battery c. Ni-Cad battery d. lead acid battery 23. Electrolysis a. is the process of producing electricity b. uses electrical energy to produce chemical change c. is used to reduce aluminum ore to pure metal d. both a and c 24. Oxidation always occurs a. with the loss of electrons b. with the gain of electrons c. with the gain of hydrogen d. only for metal atoms and not ions 25. Which of the following is a free radical? 149
6 a. SO 2 b. SO 3 c. NO d. N 2 O 26. Which of the following is a free radical? a. ozone, O 3 b. fluorine, F 2 c. chlorine, Cl 2 d. nitrogen dioxide, NO Which of the following is not an antioxidant vitamin? a. vitamin A b. vitamin D c. vitamin C d. vitamin E 28. Identify the oxidized species in the following equation 4Al(s) + 3O 2 (g) ---> 2Al 2 O 3 (s) a. Al(s) b. O 2 (g) c. Al 3+ d. O Identify the reduced species in the following equation CH 4 (g) + 2O 2 (g) ---> CO 2 (g) + 2H 2 O(g) a. C b. O 2 (g) c. H d. H 2 O 150
7 30. Which molecule would be a good oxidizing agent? a. H 2 b. SO 2 c. C d. H 2 O Which molecule would be a good reducing agent? a. O 2 b. O 3 c. H 2 d. H 2 O What is a bleaching agent? a. oxidizes colored chemicals b. reduces colored chemicals c. oxidizes bleach d. removes salts from hard water 151
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