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3rd Q Or Midterm Review
Test Description: Ludwig practice good for midterm o 3rdror 4th
Instructions: Answer all questions to get your test result.
1) What phase changes does water undergo at 100 degrees Celsius?
A
b) condensation and melting
B
d) condensation and vaporization
C
c) vaporization and freezing
D
a) melting and freezing
2) Which of the following has neither definite shape nor definite volume?
A
s
B
g
C
l
D
aq
3) The phase change in which a substance changes from a solid to a gas or vapor without changing to a liquid first is
A
d) sublimation
B
c) condensation
C
a) melting
D
b) deposition
4) Which of the following exibits hydrogen bonding?
A
NaCl
B
b) HCl
C
a) CO2
D
c) H20
5) Which of the following have the highest average kinetic energy?
A
200 ml of water at 20 degrees
B
10 ml of water at 20 degrees
C
100 ml of water at 30 degrees
D
10 ml of water at 55 degrees
6) How many electrons are shared in a triple bond?
A
2
B
4
C
6
D
0
7) What phase change is endothermic?
A
gas to solid
B
solid to liquid
C
gas to liquid
D
liquid to solid
8) Elements found on the lower left of the Periodic Table are classified as
A
Metals
B
Nonmetals
C
Noble Gases
D
Metalloids
9) In which group are Halogens found?
A
17
B
1
C
3-11
D
18
10) Which element is classified as a metal, but is liquid at room temperature?
A
I
B
Br
C
Hg
D
H
11) In which shell or energy level are the valence electrons of the elements in Period 2 found?
A
3
B
2
C
1
D
5
12) Which set of symbols represents atoms with valence electrons in the same electron shell or energy level?
A
Ba, Br, Bi
B
Mn, Hg, Cu
C
O, S, Te
D
Sr, Sn, I
13) What are two properties of most nonmetals?
A
b) high ionization energy and good electrical conductivity
B
d) low ionization energy and good electrical conductivity
C
a) high ionization energy and poor electrical conductivity
D
c) low ionization energy and poor electrical conductivity
14) For a chemical system at equilibrium, the concentrations of both the reactants and the products must
A
are constant
B
decreases
C
are equal
D
increase
15) What is the number of neutrons in an atom of Zinc?
A
a) +2
B
35
C
b) 30
D
c) 65
16) Which molecule is nonpolar?
A
d) CCl4
B
a) H2O
C
c) CO
D
b) NH3
17) Which substance will dissolve in water to conduct electricity?
A
d) CO2
B
c) NaCl
C
a) CCl4
D
b) NO2
18) At STP, fluorine is a gas and bromine is a liquid because
A
d) bromine has stronger intermolecular forces
B
b) bromine has stronger covalent bonds
C
a) fluorine has stronger covalent bonds
D
c) fluorine has stronger intermolecular forces
19) What is the mass of a neutron?
A
almost zero
B
2 atomic mass units
C
1 gram
D
1 atomic mass unit
20) In Rutherford's experiment, some of the alpha particles were deflected because...
A
atoms have a positive nucleus
B
atom are mostly empty space
C
electrons are in orbitals
D
atoms have electrons
*select an answer for all questions
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