Which does not contribute to your annual radiation dose?
A. the type of structure you live in
B. the amount of time you spend riding in jet planes
C. the number of dental X-rays you get each year
D. the number of hours you spend listening to the radio
Nathaniel Wyeth developed plastic soft drink bottles. They are made from which
polymer?
A. HDPE
B. PVC
C. PS
D. PET
Some of the uses for polypropylene are yogurt containers, carpeting, luggage, and bottle
caps. Which is not a property of polypropylene?
A. high melting point
B. very tough
C. transparent
D. resistant to oils
These are the densities of some common plastics: PET 1.38 to 1.39 g/mL; HDPE 0.95
to 0.97 g/mL; LDPE 0.90 to 0.91 g/mL. Based on these densities, which plastic/s will
sink in an ethanol/water mixture that has a density of 0.94 g/mL?
A. PET only
B. PET and HDPE
C. HDPE only
D. LDPE only
Isomers are compounds that have
A. the same chemical formulas and molecular structures but different physical
properties.
B. the same chemical formulas but different molecular structures and physical
properties.
C. different chemical formulas and molecular structures but the same physical
properties.
D. different chemical formulas, molecular structures, and physical properties.
The drawing shows two water molecules. Which statement is correct?
A. A: covalent bond; B: hydrogen bond; B is stronger
B. A: hydrogen bond; B: covalent bond; A is stronger
C. A: covalent bond; B: hydrogen bond; A is stronger
D. A: hydrogen bond; B: covalent bond; B is stronger
Which Lewis structure for formaldehyde (CH2O) is correct?
A. A
B. B
C. C
D. D
What are the major disadvantages of using ozone instead of chlorine to disinfect water?
A. Ozonation is more expensive than chlorination and ozone leaves an odor in the
water.
B. Ozonation causes trihalomethane formation and leaves an odor in the treated water.
C. Ozonation causes trihalomethane formation and is more expensive than chlorination.
D. Ozone decomposes quickly and does not provide long-term protection against
possible contamination as the water is piped through a municipal distribution system.
Which structure is correct for oleic acid, a monounsaturated fatty acid?
A.
B.
C.
D.
Small changes in _________ protein structure may lead to big changes in _________
protein structures.
A. secondary; tertiary
B. primary; secondary
C. primary; tertiary
D. tertiary; secondary
Which of the following has the lowest albedo?
A. Ocean
B. Fresh snow
C. Old snow
D. Desert sand
In a fuel cell,
A. there is oxidation, but no reduction.
B. reduction takes place at the cathode.
C. there is direct conversion of mechanical energy into electricity.
D. a chemical reaction produces heat, which then produces electricity.
Which naturally occurring radioactive particles are the size of a helium nucleus?
A. alpha particles
B. beta particles
C. gamma radiation
D. neutrons
The energy that flows from a warmer body to a colder body is called
A. heat.
B. temperature.
C. potential.
D. work.
The property of matter that determines the direction of heat flow is the
A. mass.
B. temperature.
C. volume.
D. density.
What is the mass of exactly 500 sulfur atoms?
A. 1.61 x 104 g
B. 32.1 g
C. 2.66 x 1020 g
D. 5.33 x 1023 g
Over the very long run, the energy source that has the greatest potential to meet
humanity’s needs is
A. coal.
B. hydropower.
C. renewable biomass.
D. solar (the sun).
Which factor will support the growth of nuclear energy in the future?
A. smaller, more efficient reactor design
B. a ban on the use and development of breeder reactors
C. tax incentives for the oil and gas industry
D. high cost of new, safer technology
Why can the lead-acid batteries used in cars generate electricity for several years before
running down?
A. A lead-acid battery is so large that it holds large quantities of the chemicals whose
electrochemical interaction creates the electricity.
B. The mechanical motion of the engine drives an alternator that generates electricity to
recharge the battery.
C. These batteries are used only to generate the electricity that makes the first spark
plug ‘spark.” Therefore, they are hardly used at all when a car is started, and never when
it is driven.
D. The electrons they generate, not the chemical components, provide almost all of the
electricity.
Calculate the pH of a solution prepared by dissolving 1.2 g of potassium hydroxide
(KOH) in 1,250 mL of water.
A. 0.017
B. 1.77
C. 9.22
D. 12.23
In what year will all production and importation of HCFCs end in the United States?
A. 2012
B. 2020
C. 2030
D. 2015
This is the condensed structural formula for acetaminophen, the active ingredient in the
over-the-counter medication Tylenol. What is the molecular formula of acetaminophen?
A. C8H5NO2
B. C8H11NO2
C. C8H9NO2
D. C8H8NO
What is the role of polar stratospheric clouds (PSCs) on the destruction of ozone?
A. The cold clouds react with ozone to make oxygen molecules and oxygen atoms.
B. Chemical reactions occur on the clouds that convert molecules that do no damage to
those that deplete ozone.
C. They play no role.
D. The clouds are made of chlorine atoms from CFCs.
A codon is three
A. bases in DNA.
B. amino acids in a polypeptide.
C. chemical units in a nucleotide.
D. sugar in a polysaccharide.
Which pollutant are you more likely to encounter in dangerous concentrations indoors
rather than outdoors?
A. nitrogen dioxide
B. carbon monoxide
C. ozone
D. sulfur dioxide
The carbon cycle refers to the
A. mechanism by which carbon dioxide causes global warming.
B. frequency of light energy that affects the rotational energy of carbon dioxide.
C. oxidation of glucose to form carbon dioxide and water.
D. movement of carbon through living organisms, the atmosphere, the sea, and the
earth.
Which is an oxidation half-reaction?
A. 2 H2 + O2 → 2 H2O
B. Zn → Zn2+ + 2 e
C. 2 HCl + Ba(OH)2 → 2 H2O + BaCl2
D. Cl2 + 2 e → 2 Cl
Amino acids are compounds that contain both amine and organic acid functional
groups. Which compound is an amino acid?
A.
B.
C.
D.
Which best symbolizes the hydrogen bonding between two water molecules?
A.
B.
C.
D.
Which product of the ultraviolet decomposition of CFCs acts as the catalyst for ozone
decomposition?
A. oxygen atoms
B. chlorine atoms
C. fluorine atoms
D. hydrogen atoms
The correct Lewis structure for HCl is:
A.
B.
C.
D.
Cars and trucks produce most of the NOx emissions and they also suffer the deleterious
effects of acid rain. Which negative effects of acid rain affect cars and trucks?
I. decreased gas mileage
II. damage to the paint and finish
III. increased susceptibility to rust
IV. reduced radio reception
A. I and II only
B. I and IV only
C. II and III only
D. III and IV only
The first law of thermodynamics states that
A. energy is the capacity to do work.
B. doing work is defined as causing movement against a resisting force.
C. heat flows from a warmer body to a cooler body.
D. energy is neither created nor destroyed.
Both the Clinton and G.W. Bush administrations were unwilling to sign the Kyoto
Protocol. What was their primary objection to the treaty?
A. The target emission levels are not sufficiently low to affect the greenhouse effect.
B. The treaty does not include a provision for trading emission allowances.
C. Developing countries are not required to control greenhouse gas emissions.
D. Enforcement of the treaty will be impossible.