3rd Q Or Midterm Review Question Preview (ID: 29984)
Ludwig Practice Good For Midterm O 3rdror 4th.
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What phase changes does water undergo at 100 degrees Celsius?
a) a) melting and freezing
b) b) condensation and melting
c) c) vaporization and freezing
d) d) condensation and vaporization
Which of the following has neither definite shape nor definite volume?
a) g
b) s
c) l
d) aq
The phase change in which a substance changes from a solid to a gas or vapor without changing to a liquid first is
a) a) melting
b) b) deposition
c) c) condensation
d) d) sublimation
Which of the following exibits hydrogen bonding?
a) a) CO2
b) b) HCl
c) c) H20
d) NaCl
Which of the following have the highest average kinetic energy?
a) 10 ml of water at 20 degrees
b) 200 ml of water at 20 degrees
c) 10 ml of water at 55 degrees
d) 100 ml of water at 30 degrees
How many electrons are shared in a triple bond?
a) 2
b) 4
c) 6
d) 0
What phase change is endothermic?
a) solid to liquid
b) liquid to solid
c) gas to liquid
d) gas to solid
Elements found on the lower left of the Periodic Table are classified as
a) Metalloids
b) Nonmetals
c) Metals
d) Noble Gases
In which group are Halogens found?
a) 1
b) 18
c) 3-11
d) 17
Which element is classified as a metal, but is liquid at room temperature?
a) Br
b) I
c) H
d) Hg
In which shell or energy level are the valence electrons of the elements in Period 2 found?
a) 1
b) 2
c) 3
d) 5
Which set of symbols represents atoms with valence electrons in the same electron shell or energy level?
a) Ba, Br, Bi
b) Sr, Sn, I
c) O, S, Te
d) Mn, Hg, Cu
What are two properties of most nonmetals?
a) a) high ionization energy and poor electrical conductivity
b) b) high ionization energy and good electrical conductivity
c) c) low ionization energy and poor electrical conductivity
d) d) low ionization energy and good electrical conductivity
For a chemical system at equilibrium, the concentrations of both the reactants and the products must
a) increase
b) decreases
c) are equal
d) are constant
What is the number of neutrons in an atom of Zinc?
a) a) +2
b) b) 30
c) c) 65
d) 35
Which molecule is nonpolar?
a) a) H2O
b) b) NH3
c) c) CO
d) d) CCl4
Which substance will dissolve in water to conduct electricity?
a) a) CCl4
b) b) NO2
c) c) NaCl
d) d) CO2
At STP, fluorine is a gas and bromine is a liquid because
a) a) fluorine has stronger covalent bonds
b) b) bromine has stronger covalent bonds
c) c) fluorine has stronger intermolecular forces
d) d) bromine has stronger intermolecular forces
What is the mass of a neutron?
a) 1 atomic mass unit
b) 2 atomic mass units
c) 1 gram
d) almost zero
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) atoms have electrons
d) electrons are in orbitals
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