Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
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1.
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The
forces that hold different atoms or ions together are a. | electric
currents. | c. | physical
bonds. | b. | chemical bonds. | d. | nuclear forces. | | | | |
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2.
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Each
molecule of table sugar, C12H22O11, contains a. | 0 atoms of
carbon. | c. | 6 atoms of
carbon. | b. | 1 atom of carbon. | d. | 12 atoms of carbon. | | | | |
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3.
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A
carbon atom can bond to four other atoms because it has a. | four different
cations. | c. | two inner energy
levels. | b. | four valence electrons. | d. | no protons in its nucleus. | | | | |
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4.
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The
simplest organic compound is a. | aspirin. | c. | salt. | b. | table
sugar. | d. | methane. | | | | |
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5.
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Alkanes are hydrocarbons that contain a. | single covalent
bonds only. | c. | carbon and
oxygen only. | b. | single or double covalent
bonds. | d. | carbon,
hydrogen, and oxygen. | | | | |
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6.
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Alcohols are organic compounds that contain a. | carbon and
oxygen only. | c. | carbon, oxygen,
and hydrogen. | b. | carbon and hydrogen only. | d. | carbon, nitrogen, and hydrogen. | | | | |
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7.
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Polymers are large organic molecules that are made of a. | cations. | c. | carbon and
oxygen only. | b. | anions. | d. | repeating units. | | | | |
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8.
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Which
compounds have carbon-carbon double bonds? a. | alkanes | c. | alcohols | b. | alkenes | d. | ionic
compounds | | | | |
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9.
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A
protein is a polymer that is made of a. | simple sugars. | c. | amino acids. | b. | nitrogen and
carbon dioxide. | d. | DNA. | | | | |
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10.
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The
most common elements in most living things are a. | oxygen, carbon, hydrogen, and
calcium. | b. | oxygen, carbon, hydrogen, and
nitrogen. | c. | oxygen, carbon dioxide, hydrogen, and
nitrogen. | d. | oxygen, carbon, sodium, and nitrogen. | | |
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11.
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Which
of the following terms describes a substance formed by the chemical combination of two or more
elements in a fixed ratio? a. | compound | b. | isotope | c. | nucleus | d. | enzyme | | |
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12.
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Identify the reactant(s) in the chemical reaction, CO2 + H2O
®
H2CO3. a. | CO2, H2O, and
H2CO3 | b. | CO2 and H2O | c. | H2CO3 | d. | CO2 | | |
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13.
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Which
of the following makes up a molecule of water? a. | one atom of hydrogen and one atom of
oxygen | b. | one atom of sodium and one atom of
chlorine | c. | one atom of hydrogen and two atoms of
oxygen | d. | two atoms of hydrogen and one atom of
oxygen | | |
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14.
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The
three particles that make up an atom are a. | protons, neutrons, and isotopes. | b. | neutrons,
isotopes, and electrons. | c. | positives, negatives, and electrons. | d. | protons,
neutrons, and electrons. | | |
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15.
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A
covalent bond is formed as the result of a. | transferring electrons. | b. | sharing an
electron pair. | c. | transferring protons. | d. | sharing a proton
pair. | | |
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16.
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When
hydrogen and oxygen combine and form water, water is a. | a
product. | b. | a reactant. | c. | both a product
and a reactant. | d. | neither a product nor a reactant. | | |
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17.
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Solutions that contain concentrations of H+ ions lower than pure
water a. | have pH values
below 7. | b. | are acids. | c. | are
bases. | d. | are enzymes. | | |
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18.
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If
the pH of stomach acid and of oven cleaner (a base) were measured, a. | both would be
below 7. | b. | both would be above 7. | c. | the pH of
stomach acid would be above 7, but the pH of oven cleaner would be below 7. | d. | the pH of
stomach acid would be below 7, but the pH of oven cleaner would be above 7. | | |
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19.
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A map
of eastern North America, showing the pH of rainfall in the various states, indicates that the pH of
rain in New York State varies from 4.22 to 4.40. According to these figures, the most acidic rainfall
in New York State has a pH of a. | 4.22. | b. | 4.30. | c. | 4.35. | d. | 4.40. | | |
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20.
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A
substance with a pH of 6 is called a. | an acid. | b. | a
base. | c. | both an acid and a base. | d. | neither an acid
nor a base. | | |
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21.
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A
solution is a a. | breaking of a
chemical bond. | b. | chemical reaction. | c. | uniform mixture
of two or more substances. | d. | combination of two or more liquids. | | |
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22.
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Which
of the following is a nucleotide found in DNA? a. | ribose + phosphate group + thymine | b. | ribose +
phosphate group + uracil | c. | deoxyribose + phosphate group +
uracil | d. | deoxyribose + phosphate group +
cytosine | | |
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23.
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In
eukaryotes, DNA a. | is located in
the nucleus. | b. | floats freely in the cytoplasm. | c. | is located in
the ribosomes. | d. | is circular. | | |
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24.
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RNA
contains the sugar a. | ribose. | b. | deoxyribose. | c. | glucose. | d. | lactose. | | |
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25.
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Unlike DNA, RNA contains a. | adenine. | b. | uracil. | c. | phosphate groups. | d. | thymine. | | |
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26.
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Which
of the following are found in both DNA and RNA? a. | ribose, phosphate groups, and adenine | b. | deoxyribose,
phosphate groups, and guanine | c. | phosphate groups, guanine, and
cytosine | d. | phosphate groups, guanine, and
thymine | | |
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27.
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Which
of the following foods is high in proteins? a. | vegetables | c. | fruits | b. | meat | d. | butter | | | | |
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28.
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Which
of the following foods is high in carbohydrates? a. | grains | c. | cheese | b. | fish | d. | eggs | | | | |
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29.
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Which
of the following foods is high in fats? a. | bread | c. | nuts | b. | butter | d. | meat | | | | |
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30.
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Carbohydrates include which of the following? a. | sugar and
starches | c. | protein,
starches, and water | b. | fats, sugar, and proteins | d. | glucose, fructose, and oils | | | | |
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31.
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The
sugar found in milk is called a. | sucrose | c. | lactose | b. | fructose | d. | glucose | | | | |
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32.
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Good
sources of starch include a. | fruit and honey. | c. | fish and meat. | b. | bread and
potatoes. | d. | oil and
vinegar. | | | | |
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33.
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Which
of the following statements about fats is not true? a. | There are
saturated and unsaturated fats. | c. | Fats make many
foods taste better. | b. | Fats do not dissolve in water. | d. | Fats are not necessary for life. | | | | |
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34.
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Which
of the following statements is not true? a. | Saturated fats are usually solid at room
temperature. | b. | Most animal fats are saturated. | c. | Unsaturated fats
increase your chance of getting heart disease. | d. | Most plant fats
are liquid at room temperature. | | |
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35.
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From
the food label shown, what is the percent of calories from fat?
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36.
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Carbon and other nonmetals are found in which area of the periodic
table? a. | On the left-most
side. | b. | On the right side. | c. | In the middle
column of the periodic table. | d. | In the bottom rows. | | |
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37.
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If
the atomic mass of carbon is 12 amu, 1 mole of pure carbon will have a mass of a. | 6
g. | c. | 12
g. | b. | 6
mol. | d. | 12
mol. | | | | |
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38.
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A
change in color, such as rusting of metal, is a sign that a. | a chemical
change is taking place. | c. | oxygen is
present. | b. | a physical change has just
occurred. | d. | organic
chemicals are present. | | | | |
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39.
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The
chemical formula for table sugar is C12H22O11. How many oxygen atoms
are in each sugar molecule?
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40.
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Saturated fats a. | have double bonds | c. | have double and single bonds | b. | have single
bonds | d. | have triple
bonds | | | | |
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41.
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The
pH scale ranges from a. | 1 to 10 | c. | 1 to 14 | b. | 1 to
5 | d. | 1 to
20 | | | | |
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42.
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Organic chemistry is the study of a. | carbon compounds | c. | hydrogen compounds | b. | oxygen
compounds | d. | nitrogen
compounds | | | | |
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43.
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Organic chemisty is of vital importance to which fields of science? a. | Petrochemical | c. | Textile
Industries | b. | Pharmaceutical | d. | all of the above | | | | |
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44.
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Carbon is the most versatile building block of molecules because a. | carbon has 4
valence electrons | c. | carbon is
capable of forming double and triple covalent bonds | b. | carbon can form
4 single covalent bonds | d. | A, B, and C are
correct | | | | |
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45.
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An
hydrocarbon molecule with 2 carbons and a double bond is called a. | an
alkene | c. | an
alcohol | b. | an alkane | d. | an aldehyde | | | | |
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46.
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A
molecule with hydrogen and carbon atoms is called a(n) a. | polymer | c. | hexane | b. | enzyme | d. | hydrocarbon | | | | |
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47.
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Carbon chains form the skeletons of most organic molecules. These skeletons vary
in length and may be a. | straight | d. | A, B, and C are correct | b. | branched | e. | none of the
above | c. | closed rings (cyclic) | | | | |
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48.
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When
naming alkanes, 2-2 dimethylbutane would mean that a. | there are 2
butanes | d. | there are 2
butanes attached on the number 2 carbon | b. | there are 2 methanes | e. | none of the above | c. | there are 2
methyl groups attached on the number 2 carbon | | | | |
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49.
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In
reference to the lab “Identifying Organic Compounds”, what does the chemical iodine
test? a. | Sugar | c. | Lipids | b. | Starch | d. | Proteins | | | | |
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50.
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In
reference to the lab “Identifying Organic Compounds”, what does the chemical Sudan III
test? a. | Sugar | c. | Lipids | b. | Starch | d. | Protein | | | | |
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