Contemporary Chemistry Test Bank
Course
Introduction
Contemporary Chemistry explores the fundamental principles and modern applications of chemistry in todays world. Covering core topics such as atomic structure, chemical bonding, reactions, thermodynamics, and kinetics, the course also emphasizes the role of chemistry in addressing current global challenges, including environmental sustainability, energy resources, and materials innovation. Through a combination of lectures, laboratory experiments, and real-world case studies, students develop a practical understanding of chemical concepts and how they influence technology, health, and the environment in contemporary society.
Recommended Textbook
CHEM2 Chemistry in Your World 2nd Edition by Hogg
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19 Chapters
1151 Verified Questions
1151 Flashcards
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Page 2
Chapter 1: Living in a World of Chemistry
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21 Verified Questions
21 Flashcards
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Sample Questions
Q1) An endeavor to provide an "ample margin of safety" to protect the public is an example of a
A) technology-based law.
B) balancing law.
C) risk management.
D) risk-based laws.
Answer: A
Q2) What term would be applied to expanding the number of methods to produce marketable medicines based on DNA manipulation?
A)basic research
B)applied research
C)natural science
D)social science
E)technology
Answer: E
Q3) Natural risks seem less worrisome than human-made risks.
A)True
B)False
Answer: True
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Chapter 2: The Chemical View of Matter
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59 Verified Questions
59 Flashcards
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Sample Questions
Q1) Which term describes energy?
A) motion
B) heat
C) light
D) all of these
Answer: D
Q2) How many phosphorus atoms are in the formula H<sub>3</sub>PO<sub>4</sub>?
A) 4
B) 3
C) 7
D) 1
Answer: D
Q3) Which of the following elements is a metal?
A) Ca, calcium
B) Na, sodium
C) Hg, mercury
D) all of these
Answer: D
Q4) Mg is the chemical symbol for ____________________.
Answer: magnesium
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Chapter 3: Atoms and the Periodic Table
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112 Verified Questions
112 Flashcards
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Sample Questions
Q1) Which subatomic particles are found in the nucleus of <sup>32</sup>P atom?
A) 15 protons, 15 electrons, 17 neutrons
B) 15 protons, 15 electrons, 32 neutrons
C) 15 protons, 32 neutrons
D) 15 protons, 17 neutrons
Answer: D
Q2) The third element listed on the table contains 5 valence electrons.
A)True
B)False
Answer: False
Q3) Which of the following reacts most violently with water?
A) Ne, neon
B) Na, sodium
C) Li, lithium
D) K, potassium
Answer: D
Q4) An element having this Lewis dot symbol would be classified as a __________.
Answer: nonmetal
Q5) The element with atomic number 35 belongs to the ____________family.
Answer: halogen
5
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Chapter 4: The Air We Breathe
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48 Verified Questions
48 Flashcards
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Sample Questions
Q1) Which atmospheric region contains the protective ozone layer?
A) troposphere
B) mesophere
C) stratosphere
D) thermosphere
Q2) When coal and fuel oil are burned, what two primary pollutants are formed?
A) SO<sub>2</sub> and CO<sub>2</sub>
B) HNO<sub>3</sub> and H<sub>2</sub>SO<sub>4</sub>
C) CO and O<sub>3</sub>
D) hydrocarbons and NO<sub>2</sub>
Q3) Industrial smog contains ________________but normally photochemical smog does not.
Q4) Which pollutant is related to the following sources: sea salt, automobile and truck exhaust, volcanoes, electric power plants?
A) lead
B) sulfur dioxide
C) carbon monoxide
D) particulates
Q5) A temperature of -60 °C would most likely be found near the number______.
Page 6
Q6) The troposphere is labeled with the number______.
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Chapter 5: Chemical Bonding and States of Matter
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89 Verified Questions
89 Flashcards
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Sample Questions
Q1) Choose the statement that best explains why the boiling point of ICl (97 °C) is higher than the boiling point of Br<sub>2</sub> (59 °C),
A) ICl is an ionic compound, while Br<sub>2</sub> is a covalent compound.
B) There is hydrogen bonding in ICl, but not in Br<sub>2</sub>.
C) ICl is polar while Br<sub>2</sub> is nonpolar.
D) ICl has a bent shape while Br<sub>2</sub> is linear.
Q2) The dispersal of odors is partially due to a property of gases known as A) diffusion.
B) miscibility.
C) expansion.
D) volatility.
Q3) Most substances that have molecules with approximately the same weight as water molecules are gases at room temperature. Water is a liquid at room temperature because of
A) extensive hydrogen bonding between water molecules.
B) ionic bonding between hydrogen ions and oxide ions.
C) covalent bonding between hydrogen atoms and oxygen atoms.
D) the lack of motion of water molecules.
Q4) The total number of single bonds in hexane is__________.
Q5) If X was the element K and Y the element O, which type of bond would form?
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Chapter 6: Carbon Dioxide and the Greenhouse Effect
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31 Verified Questions
31 Flashcards
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Sample Questions
Q1) The gas that is the least efficient in absorbing IR radiation is _________.
Q2) Convert 370 ppm carbon dioxide to a percentage?
A) 0.00037%
B) 0.0037%
C) 0.037%
D) 0.37%
Q3) What is another name for infrared radiation?
A) gamma rays
B) heat
C) kilocalorie
D) greenhouse gas
Q4) Which type of radiation is the most energetic?
A) microwaves
B) visible
C) ultraviolet
D) infrared
Q5) Both CO and CO<sub>2</sub> are considered to be greenhouse gases.
A)True
B)False
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Chapter 7: Chlorofluorocarbons and the Ozone Layer
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29 Verified Questions
29 Flashcards
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Sample Questions
Q1) What type of radiation is absorbed by molecular oxygen in the stratosphere?
A) UV-A
B) UV-B
C) UV-C
D) visible
Q2) Chlorofluorocarbons, such as CCl<sub>2</sub>F<sub>2</sub>, can cause problems in the upper atmosphere by destroying
A) nitrogen oxides.
B) oxygen.
C) ozone.
D) polynuclear hydrocarbons.
Q3) In the past, which of the following was not a source of atmospheric CFCs?
A) air-conditioning
B) aerosol sprays
C) refrigerants
D) blown foams
E) All of the above have been sources of atmospheric CFCs.
Q4) In order to attain a steady state one reaction must counteract another in a cycle such as that shown. A reaction which could be used to consume ozone is reaction_______.
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Chapter 8: Chemical Reactivity: Chemicals in Action
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Sample Questions
Q1) How many moles are in 15.5 g of diphosphorous pentoxide?
A) 0.109 mol
B) 0.330 mol
C) 6.56 \(\times\) 10<sup>23 </sup>mol
D) 2.20 \(\times\) 10<sup>3 </sup>mol
Q2) What is the mass of one mole of water molecules, H<sub>2</sub>O? The atomic weight of hydrogen is 1 and the atomic weight of oxygen is 16.
A) 18 g H<sub>2</sub>O
B) 18 H<sub>2</sub>O
C) 6.02 \(\times\) 10<sup>23</sup> g H<sub>2</sub>O
D) 6.02 \(\times\) 10<sup>23</sup> H<sub>2</sub>O
Q3) Which will increase the rate of a reaction?
A) increasing temperature
B) increasing temperature and concentration
C) increasing temperature and surface area
D) all of these
Q4) If a catalyst were added to this reaction, the position of letter ______ would appear lower on the energy scale.
Q5) E<sub>act</sub> is represented by the letter_______.
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Chapter 9: Acid-Base Reactions
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Sample Questions
Q1) What is the pH of a 0.0001 M HCl solution?
A) 10<sup>-4</sup>
B) 0.0001
C) - 4
D) 4
Q2) The substance Ca(OH)<sub>2</sub> is
A) an acid.
B) a hydrate.
C) a base.
D) an oxide.
Q3) What is the salt formed when an HCl solution reacts with Mg(OH)<sub>2</sub>?
A) MgCl<sub>2</sub>
B) Mg<sub>2</sub>Cl
C) MgCl
D) Mg<sub>2</sub>Cl<sub>2</sub>
Q4) What is the hydronium concentration with pH = 9.5?
A) 3.16 \(\times\) 10<sup>-10</sup>
B) 9.50 \(\times\) 10<sup>-10</sup>
C) 9.15
D) 3.16 \(\times\) 10<sup>10</sup>
Page 11
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Chapter 10: Oxidation-Reduction Reactions
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47 Verified Questions
47 Flashcards
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Sample Questions
Q1) Which of the following are paired correctly?
A) H<sub>2</sub>O<sub>2</sub> - oxidizing agent
B) NaOCl - reducing agent
C) Cl<sub>2</sub> - reducing agent
D) SO<sub>2</sub> - oxidizing agent
Q2) Which of the following is not necessary for corrosion of iron?
A) iron
B) water
C) light
D) oxygen
Q3) When a zinc strip is placed in a copper(II) sulfate solution,
A) the copper(II) solution will lose its blue color.
B) the zinc will dissolve.
C) black crystals of copper atoms appear.
D) All of the above occur.
Q4) Which one of the following will not combine with oxygen?
A) nitrogen
B) aluminum
C) hydrogen
D) helium
Page 12
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Chapter 11: Water, Water Everywhere but Not a Drop to Drink
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50 Flashcards
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Sample Questions
Q1) Which of the following is the major user of water in the United States?
A) households
B) industry
C) agriculture
D) steam-electric utilities
Q2) Acid rain (acid deposition) contributes to which of the following problems?
A) dead lakes where fish cannot survive
B) damage to forests
C) leaching of metal ions into groundwater
D) all of these
Q3) The lime-soda treatment of water might introduce too much of which of the following ions in drinking water?
A) Na<sup>+</sup>
B) Ca<sup>2+</sup>
C) Mg<sup>2+</sup>
D) Fe<sup>3+</sup>
Q4) Potable is another term for polluted water.
A)True
B)False
Q5) The source of water for "G" is region labeled by the letter_____.
Page 13
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Chapter 12: Energy and Hydrocarbons
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57 Flashcards
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Sample Questions
Q1) Fractional distillation of petroleum
A) separates and purifies all of the hydrocarbons in crude oil.
B) separates fractions, each of which contain many hydrocarbons.
C) is the final step in refining gasoline.
D) fractions large molecules into smaller ones.
Q2) Octane ratings are based on comparison of the fuel being tested with the knocking properties of mixtures of
A) hexane and heptane.
B) isooctane and hexane.
C) isooctane and heptane.
D) heptane and nonane.
Q3) The name of the C<sub>2</sub>H<sub>5</sub>- group is A) methyl B) ethyl.
C) propyl.
D) butyl.
Q4) Among the alkanes, alkenes, and alkynes only the alkanes contain only single bonds. A)True B)False
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Chapter 13: Nuclear Changes and Nuclear Power
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73 Verified Questions
73 Flashcards
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Sample Questions
Q1) If the half-life of an element is 12 years. How much of a 5.00 g sample remains after 36 years?
A) 2.50
B) 1.25
C) 0.625
D) 0.313
Q2) If a 500. mg sample of element X had been used, _____mg would remain after 60 hours.
Q3) If the half-life of an element is 5 days and 100 milligrams of that element is initially available, how many milligrams of the element are present after 25 days?
A) 50 mg
B) 100/25 mg
C) 100/32 mg
D) 100/64 mg
Q4) Who first discovered radioactivity?
A) Ernest Rutherford
B) Max Planck
C) Marie Curie
D) Henri Becquerel
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Chapter 14: Organic Chemicals and Polymers
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61 Verified Questions
61 Flashcards
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Sample Questions
Q1) An addition polymer that finds use in fibers for rugs and fabrics is A) polypropylene.
B) PVC.
C) nylon.
D) polyacrylonitrile.
Q2) An organic compound with an -NH<sub>2</sub> functional group is a (n) A) primary amine. B) ketone.
C) ether.
D) primary alcohol.
Q3) Which of the following is a correct pairing between the given formula and the type of functional group?
A) CH<sub>3</sub>CH<sub>2</sub>CH<sub>3</sub>, alkene
B) CH<sub>3</sub>OCH<sub>3</sub>, ether
C) CH<sub>3</sub>CH<sub>2</sub>NH<sub>2</sub>, amide
D) CH<sub>3</sub>COOH, aldehyde
Q4) This substance could be produced by the ________________ of a primary alcohol.
Q5) This substance can react with ethanol to produce a compound containing a(n) __________functional group.
Q6) This substance would have a pH________than 7.
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Chapter 15: The Chemistry of Life
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Sample Questions
Q1) The process in which mRNA is used to synthesize protein
A) transcription.
B) translation.
C) replication.
D) recombination.
Q2) Hydrolysis of lactose yields
A) "D-glucose only."
B) "D-glucose and D-fructose."
C) "\(\beta\)-D-glucose and \(\alpha\)-D-glucose."
D) "D-galactose and D-glucose."
Q3) Fats tend to be saturated compounds while oil are unsaturated.
A)True
B)False
Q4) Which of the following represents the composition and structure of a nucleotide? [P = phosphate group, S = sugar, B = nitrogenous base]
A) P-S-B
B) S-B
C) P-B
D) S-P-B
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Chapter 16: Nutrition: the Basis of Healthy Living
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Sample Questions
Q1) Which of the following sets does not include at least one of the classes of nutrients?
A) water, carbohydrates
B) fats, vitamins
C) acids, bases
D) proteins, fats
Q2) A blood serum cholesterol level of 240. mg/100 mL serum is considered to put a person at a high risk of heart disease. How much cholesterol in milligrams would be carried in the blood serum of a person with blood volume of 11.0 pints? (1 pint = 473 mL)
A) 103 mg
B) 1.25 × 10<sup>6</sup> mg
C) 5.20 × 10<sup>3</sup> mg
D) 12,500 mg
Q3) A calcium deficient diet is often associated with a condition known as osteoporosis. A)True
B)False
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Chapter 17: Chemistry and Medicine
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Sample Questions
Q1) Effect on the central nervous system is dose related not drug identity related
A)stimulant
B)depressant
C)hallucinogen
D)antitussive
E)expectorant
F)analgesic
G)antihistamine
H)antibiotic
Q2) Which does not apply to codeine?
A) analgesic
B) opioid
C) scheduled drug with a potential for abuse
D) antibiotic
Q3) A Schedule 1 drug is one that
A) over the counter drug available to anyone.
B) has no medical use and is a controlled substance.
C) a prescription drug with two refills.
D) an unregulated nonmedical drug.
Q4) Acetaminophen would be classified as ___________________.
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Chapter 18: The Chemistry of Useful Materials
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Sample Questions
Q1) Older glass beverage bottles were green due to the presence of which metal ion in the silica from which the bottle was made?
A) Fe<sup>2+</sup>
B) Cu<sup>2+</sup>
C) Sn<sup>4+</sup>
D) Ca<sup>2+</sup>
Q2) What structural unit is characteristic of quartz and most silicates?
A) planar
B) trigonal planar
C) tetrahedral
D) linear
Q3) Most metals are found in the Earth as
A) positive ions.
B) negative ions.
C) neutral atoms.
D) molecules.
Q4) Germanium could be used as the dopant indicated by the letter ______.
Q5) The product of the cell reaction produced at the position indicated by the number 2 is ______________.
Q6) Iron ions form iron atoms in the area indicated by the number ______.
Page 20
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Chapter 19: Feeding the World
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Sample Questions
Q1) Ammonium nitrate, NH<sub>4</sub>NO<sub>3</sub>,
A) is produced from the reaction of a nitrate with sodium carbonate.
B) is a straight fertilizer.
C) must be washed into the soil with rain or irrigation.
D) is produced by the Haber process.
E) All of these characterize ammonium nitrate.
Q2) A bag of fertilizer is labeled 22-6-8, this indicates that the composition is:
A) 22% N, 6% P, 8% K.
B) 22% N, 6% P<sub>2</sub>O<sub>5</sub>, 8% K<sub>2</sub>O.
C) 22% P, 6% N, 8% K.
D) 22% N<sub>2</sub>O<sub>5</sub>, 6% P, 8% K<sub>2</sub>O.
E) 22% NH<sub>3</sub>, 6% P<sub>2</sub>O<sub>5</sub>, 8% K.
Q3) Which is not used as a nitrogen fertilizer?
A) urea
B) ammonium nitrate
C) ammonia
D) nitrous oxide
Q4) ______is a broad approach to limiting the use of pesticides.
Q5) __________ has decreased energy costs but increased labor costs.
Q6) Crop rotation would be an example of ___________________.
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