MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.

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Esmond Cobb
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1 Exam Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) In the nuclear transmutation, 16 8 O (p, a)13 N, what is the bombarding particle? 7 A) a beta particle B) a phosphorus nucleus C) a proton D) a gamma photon E) an alpha particle Table 20.2 Half-reaction Ee (V) Cr3+ (aq) + 3e- Cr (s) Fe2+ (aq) + 2e- Fe (s) Fe3+ (aq) + e- Fe2+ (s) Sn4+ (aq) + 2e- Sn2+ (aq) ) The standard cell potential (Eecell) for the voltaic cell based on the reaction below is V. Sn2+ (aq) + 2Fe3+ (aq) 2Fe2+ (aq) + Sn4+ (aq) A) B) C) D) E) ) The standard cell potential (Eecell) for the voltaic cell based on the reaction below is V. 3Sn4+ (aq) + 2Cr (s) 2Cr3+ (aq) + 3Sn2+ (aq) A) B) C) D) E) ) The standard cell potential (Eecell) for the voltaic cell based on the reaction below is V. Cr (s) + 3Fe3+ (aq) 3Fe2+ (aq) + Cr3+ (aq) A) B) C) D) E) ) What is the missing product from this reaction? P S + A) 4 2 He B) 0 0 g C) 0 1 p D) 0-1 e E) 0 1 e 1

2 6) In balancing the nuclear reaction U E + 4 He, the identity of element E is 2 A) Pu. B) Pa. C) U. D) Np. E) Th. 7) The purpose of the salt bridge in an electrochemical cell is to. A) provide a source of ions to react at the anode and cathode. B) provide a means for electrons to travel from the anode to the cathode. C) maintain electrical neutrality in the half-cells via migration of ions. D) provide a means for electrons to travel from the cathode to the anode. E) provide oxygen to facilitate oxidation at the anode. 8) Alcohols are hydrocarbon derivatives in which one or more hydrogens have been replaced by a hydroxyl functional group. is the general formula of an alcohol. A) RπOH B) RπCOπH C) RπOπR D) RπCOπOH E) RπCOπR 9) What happens to the mass number and the atomic number of an element when it undergoes beta decay? A) The mass number decreases by 4 and the atomic number decreases by 2. B) The mass number does not change and the atomic number increases by 1. C) The mass number increases by 2 and the atomic number increases by 1. D) The mass number does not change and the atomic number decreases by 2. E) Neither the mass number nor the atomic number change. 10) The balanced half-reaction in which sulfate ion is reduced to sulfite ion is a process. A) three-electron B) six-electron C) four-electron D) one-electron E) two-electron 11) What is the oxidation number of chromium in the dichromate ion? A) +12 B) +7 C) +6 D) +14 E) +3 12) Which of the following compounds does not contain a ChO bond? A) ketones B) ethers C) amides D) aldehydes E) esters 13) The electrode at which oxidation occurs is called the A) oxidizing agent B) reducing agent C) cathode D) anode E) voltaic cell 2

3 14) What drives the turbine in a nuclear power plant? A) steam B) the control rods C) the primary coolant D) the moderator E) UF6 gas 15) Hydrocarbons containing carbon-carbon triple bonds are called. A) alkynes B) olefins C) aromatic hydrocarbons D) alkanes E) alkenes 16) Cathodic protection of a metal pipe against corrosion usually entails A) coating the pipe with another metal whose standard reduction potential is less negative than that of the pipe. B) coating the pipe with a fluoropolymer to act as a source of fluoride ion (since the latter is so hard to oxidize). C) attaching a dry cell to reduce any metal ions which might be formed. D) attaching an active metal to make the pipe the cathode in an electrochemical cell. E) attaching an active metal to make the pipe the anode in an electrochemical cell. 17) What is required for a nuclear transmutation to occur? A) very high temperature B) gamma emission C) spontaneous nuclear decay D) a corrosive environment E) a particle to collide with a nucleus 18) The gain of electrons by an element is called. A) reduction B) oxidation C) fractionation D) sublimation E) disproportionation 19) What percentage of electricity generated in the U.S. is from commercial nuclear plants? A) 1% B) 50% C) 20% D) 90% E) 10% 3

4 20) The half-life of a radionuclide A) is constant. B) gets longer with increased temperature. C) gets longer with passing time. D) gets shorter with increased temperature. E) gets shorter with passing time. 21) What is emitted in the nuclear transmutation, Al(n,?) Na? A) a proton B) an alpha particle C) a gamma photon D) a beta particle E) a neutron 22) The more the value of Eered, the greater the driving force for reduction. A) exothermic B) extensive C) negative D) positive E) endothermic 23) By what process does thorium-230 decay to radium-226? A) alpha emission B) beta emission C) positron emission D) electron capture E) gamma emission 24) Which one of the following can be done to shorten the half-life of the radioactive decay of uranium-238? A) heat it B) oxidize it to the +2 oxidation state C) freeze it D) convert it to UF6 E) none of the above 25) In a voltaic cell, electrons flow from the to the. A) cathode, anode B) salt bridge, cathode C) anode, salt bridge D) salt bride, anode E) anode, cathode 4

5 26) Atoms with the same atomic number and different mass numbers A) are allotropes B) do not exist. C) are resonance structures. D) are isomers. E) are isotopes. 27) One of the differences between a voltaic cell and an electrolytic cell is that in an electrolytic cell. A) electrons flow toward the anode B) a nonspontaneous reaction is forced to occur C) an electric current is produced by a chemical reaction D) O2 gas is produced at the cathode E) oxidation occurs at the cathode 28) The compound below is a(n). A) aldehyde B) ester C) amine D) ketone E) carboxylic acid 29) Which one of the following is a correct representation of a beta particle? A) 0 1 e B) 0-1 e C) 1 0 b D) 4 2 e E) 2 4 b 30) When ionizing radiation enters the body, what is the predominant free radical produced? A) H3O B) H C) protein D) H2O E) OH 31) Of the following processes, which one changes the atomic number? A) beta emission B) alpha emission C) electron capture D) positron emission E) All of these processes change the atomic numbers. 5

6 32) The main scientific difficulty in achieving a controlled fusion process is the A) very large number of gamma rays emitted. B) very large number of positrons emitted. C) enormous repulsion between the electrons of atoms being fused. D) very large number of x-rays emitted. E) enormous repulsion between nuclei being fused. 33) Which one of the following types of elements is most likely to be a good oxidizing agent? A) transition elements B) alkali metals C) halogens D) lanthanides E) alkaline earth elements 34) Which type of radioactive decay results in no change in mass number and atomic number for the starting nucleus? A) beta B) gamma C) electron capture D) positron emission E) alpha 6

7 Answer Key Testname: F.TST MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) C 2) C 3) D 4) C 5) D 6) E 7) C 8) A 9) B 10) E 11) C 12) B 13) D 14) A 15) A 16) D 17) E 18) A 19) C 20) A 21) B 22) D 23) A 24) E 25) E 26) E 27) B 28) B 29) B 30) E 31) E 32) E 33) C 34) B 1

1052-3rd Chem Exam (A)

1052-3rd Chem Exam (A) 1052-3rd Chem Exam-1060621 (A) MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) How many isomers are possible for C5H12? A) 1 B) 2 C) 10 D) 4 E)