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CHE 101 Review
CHE 101 Review
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Review for Final Exam
Flashcards
75 cards
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Practice quiz
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Questions
75
Answers
1
The charge on a neutron is:
0
-1
+1
2
Which of the following elements is a metalloid?
Ge
La
U
3
The fat-soluble vitamins (ADEK) belong to the following class of compounds:
lipids
carbohydrates
enzymes
4
Biologically active compounds secreted by the endocrine glands are called:
vitamins
enzymes
hormones
5
Which of the following is NOT a property of metals?
react with nonmetals
good conductors of heat
tend to form anions
6
Amino acids are the building blocks of:
carbohydrates
nucleic acids
proteins
7
What is the correct name of the following compound?
NH
4
Cl
ammonium chlorine
ammonium chloride
ammonia chloride
8
A theory is best defined as:
a tentative explanation for a set of observations
a unifying principle which stands up to repeated testing
a conclusion which is undoubtedly correct
9
Which of the following is a base?
LiOH
HNO3
KBr
10
Avogadro’s number (6.022 x 10
23
) is the number of :
atoms in 1 mole of sodium
molecules in 1 gram of water
grams in 1 mole of sulfur
11
Which family of elements does calcium belong to?
metalloids
transition metals
alkaline earth metals
12
The smallest unit of an element, which has all the properties of the element is called:
an atom
a nucleus
a molecule
13
The energy of a moving object is called:
potential energy
kinetic energy
motion energy
14
Which mass is the smallest?
1 pg
1 kg
1 mg
15
The type of bond resulting from sharing of electrons is called a (an):
hydrogen bond
covalent bond
ionic bond
16
The iron(III) ion has the following symbol:
Fe3+
Fe3
Fe+
17
Which of the following is a chemical property?
color
density
reactivity with oxygen
18
Starch and cellulose are in the following class of biomolecules:
lipids
carbohydrates
proteins
19
The group
VIIIA
elements are called:
free gases
noble gases
balloon gases
20
The number 7.9 x 10-4 may also be written:
0.00079
7.900
790.0
21
How many
valence electrons
are there in an atom of magnesium?
2
12
8
22
Which of the following terms is NOT associated with the quantum mechanical model of the atom?
subshell
halogen
orbital
23
Which of the following compounds is a saturated hydrocarbon, also called an
alkane
?
CH3OCH3
CH3CH2CH3
CH3COOH
24
Which class does this compound belong to?
CH
3
NH
2
amines
alcohols
ketones
25
Which of the following is NOT a state of matter?
liquid
metal
gas
26
Organic chemistry deals with the compounds of:
nitrogen
oxygen
carbon
27
Which of the following is
true
for
Ca
3
(PO
4
)
2
?
there are 4 oxygen atoms per formula unit.
there are 6 calcium atoms per formula unit.
there are 2 phosphorus atoms per formula unit.
28
Isoelectronic species have the same number of electrons. Which are NOT isoelectronic?
Na+ and Ne
S2- and Ar
K+ and Ca
29
The atomic number of an element is the number of:
protons
neutrons
electrons
30
Which of the following is ionic?
Cl2
H2O
KBr
31
What is the correct name for the following formula:
NO
2
nitrogen dioxide
nitrogen oxide
mononitrogen dioxide
32
A reaction which gives off heat is called an ? reaction
exothermic
androthermic
mesothermic
33
A compound is defined as
pure substance composed of two or more different elements
a combination of two atoms
a mixture of two pure substances
34
Which of the following molecules is polar?
CCl4
N2
HCl
35
Which of these elements is NOT found in nature in uncombined form because it is so reactive?
potassium
nitrogen
argon
36
Which of the following generates H+ in water?
acid
salt
base
37
What are the strongest type of intermolecular forces in liquid bromine (Br
2
)?
dispersion forces
dipole forces
hydrogen bonds
38
In an isotope the
mass number
is the sum of:
protons and neutrons
protons and electrons
neutrons and electrons
39
In which state of matter do atoms or molecules have the most freedom of movement?
liquid
solid
gas
40
Malleability
and
ductility
are properties of:
gases
nonmetals
metals
41
The amount of heat required to raise the temperature of 1 gram of water 1 degree Celsius is:
1 calorie
1 pascal
1 torr
42
Branch of chemistry that is a study of chemical phenomena at the atomic, and molecular level
biochemistry
physical chemistry
inorganic chemistry
43
A strong acid readily produces ? in water.
chloride ions
hydroxide ions
hydronium ions
44
A colloid is best defined as:
a mixture which lies between a solution and a suspension.
a type of crystal formed when water evaporates
a molecule formed from atoms of the same element
45
A measure of resistance to flow is called
viscosity
mass
density
46
A compound which contains a benzene ring is called:
aliphatic
aromatic
photomatic
47
In a chemical change:
a substance changes color.
heat is always given off.
a new substance is formed.
48
Elements in the periodic table are arranged in order of increasing
atomic number
atomic radius
atomic mass
49
The nucleus of an atom is composed of:
protons and neutrons
protons and electrons
electrons and neutrons
50
What is the correct name for
HF (aq)
?
hydrogen fluorine
hydrofluoric acid
hydrofluorine acid
51
Approximately when did quantum theory develop?
early 1900s
early 1600s
ancient Greece
52
The nuclear reaction which involves splitting a heavier nucleus into two lighter nuclei is:
transmutation
fission
fusion
53
Mass/Volume are the units of:
density
energy
force
54
Under STP conditions, one mole of a gas occupies this volume:
22.4 liters
1 million liters
1 liter
55
Molarity (M) has the following units:
g/liter
mol/liter
g/mol
56
The letters
s
,
p
,
d
, and
f
are used to designate types of:
molecular crystals
electron orbitals
covalent bonds
57
Combustion is the reaction of a substance with the following gas:
fluorine
oxygen
nitrogen
58
Which of the following is a
heterogeneous
mixture?
vinegar (a mixture of water and acetic acid)
salsa(a mixture of tomatoes, peppers, and other ingredients)
air (a mixture of nitrogen, oxygen, and other gases)
59
How many significant figures are there in
2.0970 x 10
-6
three
four
five
60
The pH of an acidic solution is:
zero
greater than 7
less than 7
61
The scientist who, in 1803, proposed the first atomic theory was:
Schrodinger
Dalton
Einstein
62
What is an
aqueous
solution?
a solution which contains sodium chloride
a solution in which water is the solvent
a solution which conducts electricity
63
Which of the following is NOT a unit of pressure?
cm2
mm Hg
kPa
64
Isotopes
differ in their:
mass
atomic number
charge
65
The number 3.6964 rounded to three significant figures is:
3.700
3.70
3.69
66
Which of the following contains the greatest number of atoms?
55.85 grams of iron
22.99 grams of sodium
2 moles of copper
67
Which of the following has the largest atomic radius
Cs
He
Li
68
The rows on the periodic table are called
periods
shells
groups
69
Which of the following compounds can undergo hydrogen bonding?
CF4
NH3
CO2
70
Which is the correct formula for sodium carbonate?
NaCO3
NaCO2
Na2CO3
71
Compounds which have the same formula but different structure are called:
polymers
isomers
monomers
72
Which of the following is NOT a compound?
F2
calcium bromide
water
73
Which of the following is NOT an element?
Cl2
CO
O2
74
What is the correct formula for the compound formed from the following ions:
Al
3+
+ PO
4
3-
Al(PO4)3
Al3(PO4)3
AlPO4
75
The branch of chemistry which deals with detecting and quantitating substances is called:
inorganic chemistry
physical chemistry
analytical chemistry
