1032_4th Exam_1040624(A)
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
1) Define mass defect.
A) an atom with too many neutrons
B) energy absorbed in a radioactive reaction C) energy released in a radioactive reaction
D) the difference in mass between an atom and the sum of its separate components E) the difference in mass between a radioactive atom and a nonradioactive atom Answer: D
2) Describe what changes occur during alpha decay.
A) The mass number and atomic number increases.
B) The mass number and atomic number decreases.
C) The mass number increases and the atomic number decreases.
D) The mass number and atomic number do not change.
E) The mass number is unchanged and the atomic number increases.
Answer: B
3) Which particle has the lowest penetrating power?
A) neutron particle B) alpha particle C) gamma particle D) electron emission
E) positron capture Answer: B
4) The combination of two light nuclei to form a heavier nuclei is called ________.
A) nuclear fission B) nuclear fusion C) half life
D) radioactive cleavage E) radioactive merge Answer: B
5) The chart below shows the mass of a decaying nuclide versus time. What is the half-life of the decay?
A) 70 min B) 25 min C) 35 min D) 15 min
Answer: C
6) Iron-59 is a beta emitter with a half-life of 44.5 days. If a sample initially contains 132 mg of iron-59, how much iron-59 is left in the sample after 265 days?
A) 33.2 mg B) 0.00 mg C) 2.13 mg D) 66.0 mg
Answer: C
7) An artifact has a carbon-14 decay rate of 8.55 disintegrations per minute per gram of carbon (8.55 dis/min ·g C).
Living organisms have carbon-14 decay rate of 15.3 dis/min · g C. How old is the artifact? (The half-life of carbon-14 is 5730 yr.)
A) 1.21 × 10-4 yr B) 3.20 × 103 yr C) 4.81 ×103 yr D) 2.10 × 103 yr Answer: C
8)An igneous rock contains a Pb-206/U-238 mass ratio of 0.372. How old is the rock? (U-238 decays into Pb-206 with a half-life of 4.5 × 109 yr.)
A) 2.05 *× 109 yr B) 4.50 × 109 yr C) 2.32 × 109 yr D) 6.42 × 109 yr Answer: C
9) Calculate the nuclear binding energy per nucleon for cobalt-59, the only stable isotope of cobalt. The mass of cobalt-59 is 58.933198 amu. (The mass of H 11 is 1.00783 amu, and the mass of a neutron is 1.00866 amu.)
A) 8.768 MeV B) 19.16 MeV C) 517.3 MeV D) 1.011 × 10-5 MeV
Answer: A
10) Determine the identity of the daughter nuclide from the electron capture by 8137Rb.
A) 8138Sr B) 8036Kr C) 7735Br D) 8539Y E) 8136Kr
Answer: E
11) Write the nuclear equation for the alpha decay of 22688 Ra.
A) 22688 Ra 1
0n + 22588 Ra B) 22688 Ra 4
2He + 22286 Rn C) 22688 Ra 0
-1e + 22689 Ac D) 22688 Ra + 42He 230
90 Th E) 22688 Ra + 0+1e 226
89 Ac Answer: B
12) Which of the following nuclides are most likely to decay via beta decay?
A) I-126 B) Al-24 C) Na-20 D) Cs-137 E) N-13
Answer: D
13) Determine the identity of the daughter nuclide from the beta decay of 8938Sr.
A) 8939Y B) 9038Sr C) 8734Se D) 9039Y E) 8536Kr
Answer: A
14) Calculate the mass defect in Mo-96 if the mass of a Mo-96 nucleus is 95.962 amu. The mass of a proton is 1.00728 amu and the mass of a neutron is 1.008665 amu.
A) 0.795 amu B) 0.212 amu C) 0.812 amu D) 0.197 amu E) 0.188 amu Answer: C
15) Determine the identity of the daughter nuclide from the positron emission of 137 N.
A) 148 O B) 179 F C) 95B D) 136 C E) 138 O
Answer: D
16) Determine the identity of the daughter nuclide from the alpha decay of 22890 Th.
A) 23292 U B) 23289 Ac C) 22991 Pa D) 22090 Th E) 22488 Ra Answer: E
17) Write a nuclear equation to describe the spontaneous fission of 24495 Am to form I-134 and Mo-107. Determine how many neutrons are produced in the reaction.
A) 3 B) 1 C) 0 D) 2 E) 4
Answer: A
18) Determine the identity of the daughter nuclide from the positron emission of 158 O.
A) 147 N B) 156 C C) 157 N D) 116 C E) 169 F
Answer: C
19) The following reaction represents what nuclear process?
214
82 Pb 0
-1e + 214 83 Bi
A) electron capture B) alpha emission C) beta emission D) gamma emission
E) neutron bombardment Answer: C
20) Which structure can exhibit optical isomerism?
A) B)
C) D)
Answer: B
21) Determine the product of the reaction.
A) B)
C) D)
Answer: D
22) Which of the following compounds is an ketone?
A)
B)CH3CH2CH2CO2H C)
D)CH3CH2NH2 E)
Answer: C
23) Arrange the following in order from least oxidized to most oxidized.
A) III < I = II B) I < III < II C) I < II < III D) III < I < II E) II < I < III Answer: D
24) Determine the products of the following reaction:
A)
B)
C)
D)
E)
Answer: C
25) Name the following compound.
A) 1-butanoate B) 1-butanal C) butanoic acid D) propyl methanoate
E) propyl butanoate Answer: C
26) Name the following compound.
A) 2-butanal B) ethyl ethanoate C) 1-butanoic acid D) methyl propyl ether
E) ethyl propanoate Answer: D
27) Name the following compound.
A) 3-ethyl-1-butyne B) 3-methyl-4-pentyne C) 1-hexyne
D) 3-methyl-1-pentyne E) 2-ethynebutane Answer: D
28) Determine the products of the following reaction:
A)
B)
C)
D)
E)
Answer: D
29) Give the product of the reduction of the following compound.
A)CH3CH2OCH3 B)CH3CH2CHO C)CH3CH2CH3 D)CH3CH2COOH
E)CH3CH2CH2OH Answer: E
30) Which of the following compounds exhibit geometric isomerism?
A)CH2=CH2 B)CH2=CCl2 C)CBr2=CHBr D)(CH3)2C=CH-CH3
E) CHCl=CHCl Answer: E
31) Complete and balance the following complete hydrogenation reaction.
CH3CH2C CCH3 + 2 H2 ?
A)CH3CH2C CCH3 + 2 H2 CH3CH2CH2CH2CH3 B)CH3CH2C CCH3 + 6 H2 5 CH4
C)2 CH3CH2C CCH3 + 2 H2 CH3CH2CH2CH2CH2CH2CH2CH2CH2CH3 D)CH3CH2C CCH3 + 2 H2 CH3CH2CH2 CH2CH3
E)CH3CH2C CCH3 + 3 H2 CH3CH2CH3 + CH3CH3 Answer: A
32) How many of the carbons in the following compound are chiral center(s)?
A) 4 or more B) 1 C) 3 D) 2 E) 0
Answer: C
33) A carboxylic acid reacts an alcohol to form ________.
A) an amine B) an anhydride C) an ether D) an ester
E) an amide Answer: D
34) Name the following compound.
A) 4-methyl-4-propylpentane B) 4-propyl-4-methylpentane C) 2-methyl-2-propylpentane D) 4,4-dimethylheptane
E) nonane Answer: D
35) Which of the following names is correct?
A) 2-ethyl-3-pentene B) 3,3-diethyl-4-propene C) 2-methyl-1-butene D) 1-propyl-2-pentene
E) None of the above are correct.
Answer: C
36) Name the following compound.
A) 1-pentanal B) 1-pentanone C) 1-hexenol D) hexanal E) pentenel Answer: D
37) Determine the product(s) of the reduction of the following compound:
A)
B)
C)
D)
E)
Answer: E
38) Choose the polysaccharide from the compounds below.
A)
B)
C)
D)
E)
Answer: D
39) Which of the following is an example of an aldopentose?
A)
B)
C)
D)
E)
Answer: A
40) Which of the following is an example of a ketohexose?
A)
B)
C)
D)
E)
Answer: D
41) Identify the sugar in DNA.
A) galactose B) deoxyribose C) ribose D) fructose E) glucose
Answer: B
42) What type of lipid is the following compound?
A) steroid B) phospholipid C) fatty acid D) triglyceride
E) glycolipid Answer: D
43) Which of the following form between glycerol and fatty acids to form triglycerides?
A) amide bonds B) ester linkages C) alcohol bonds D) disulfide linkages
E) glycosidic linkages Answer: B
44) Which of the following link together amino acid units?
A) glycosidic linkages B) peptide bonds C) hydrogen bonds D) sulfide linkages
E) ester linkages Answer: B
45) How many nucleotides are required to code for all of the amino acids in a protein that contains 186 amino acids?
A) 372 B) 1 C) 186 D) 558
Answer: D
46) What is between the two strands of DNA, holding them together?
A) dipole-dipole bonds B) ionic bonds
C) covalent bonds D) hydrogen bonds
E) London dispersion forces Answer: D
47) The following is part of a DNA sequence. What is its complementary sequence?
AGTTCGAGCCT A) AGTTCGAGCCT
B) AGGCTCGAACT C) TCCGAGCTTGA D) TCAAGCTCGGA
E) CAGTCCA Answer: D
48) Which of the following statements is TRUE?
A) Thymine and Adenine are a complementary base pair that forms 2 hydrogen bonds.
B) Cytosine and Thymine are a complementary base pair that forms 3 hydrogen bonds.
C) Thymine and Guanine are a complementary base pair that forms 2 hydrogen bonds.
D) Adenine and Guanine are a complementary base pair that forms 3 hydrogen bonds.
E) Cytosine and Guanine are a complementary base pair that forms 2 hydrogen bonds.
Answer: A
49) How many of the carbons in the following structure are chiral?
A) 4 or more B) 0 C) 3 D) 1 E) 2
Answer: C
50) Which compound is an amino acid?
A)
B)
C)
D)
Answer: A
