AP Chem Exam Review
It’s another day, and that means it’s time for another examination on an Advanced Placement subject! Today we’ll be looking at one of the cornerstones of scientific study; Chemistry! How much do you know about the states of matter, for example? Find out in this AP Chem Exam Review!
- 1.In liquids, the attractive intermolecular forces are
- A.
Very weak compared with kinetic energies of the molecules
- B.
Strong enough to hold molecules relatively close together
- C.
Strong enough to keep the molecules confined to vibrating about their fixed lattice points
- D.
Not strong enough to keep molecules from moving past each other
- E.
Strong enough to hold molecules relatively close together but not strong enough to keep molecules from moving past each other
- 2.As a solid element melts, the atoms become ________ and they have _________ attraction for one another.
- A.
More separated, more
- B.
More separated, less
- C.
Closer together, more
- D.
Closer together , less
- E.
Larger, greater
- 3.Which statement is true about liquids?
- A.
They flow and are highly ordered.
- B.
They are highly ordered and not compressible.
- C.
They flow and are slightly compressible.
- D.
They assume both the volume and shape of their containers.
- 4.What is the predominant intermolecular force in AsH3?
- A.
London-dispersion forces
- B.
Ion-dipole attraction
- C.
Ionic bonding
- D.
Dipole-dipole attraction
- E.
Hydrogen bonding
- 5.The principal source of the difference in the normal boiling points of ICl (97 degrees C; molecular mass 162 amu) and Br (59 degrees C; molecular mass 160 amu) is _________.
- A.
London dispersion forces
- B.
Dipole-dipole interactions
- C.
Hydrogen bonding
- D.
Both hydrogen bonding and dipole-dipole interactions
- 6.When NaCl dissolves in water, aqueous Na+ and Cl- ions result. The force of attraction that exists between Na+ and H2O is called a(n) ____________ interaction.
- A.
Dipole-dipole
- B.
Ion-ion
- C.
Hydrogen bonding
- D.
Ion-dipole
- E.
London dispersion force
- 7.Of the following substances, only _________ has London dispersion forces as its only intermolecular force.
- A.
CH3OH
- B.
NH
- C.
H2S
- D.
CH4
- E.
HCl
- 8.Which of the following compounds will have hydrogen bonds as one of its intermolecular forces?
- A.
HF and NH3
- B.
SiH4 only
- C.
CH4 only
- D.
NH3 only
- E.
HF only
- 9.Which of the following should have the lowest boiling point?
- A.
PH3
- B.
H2S
- C.
HCl
- D.
SiH4
- E.
H2O
- 10.Of the following substances, _____ has the highest boiling point.
- A.
H2O
- B.
CO2
- C.
CH4
- D.
Kr
- E.
NH3
- 11.The shape of a liquid is determined by
- A.
The viscosity of the liquid
- B.
The type of material the container is made of
- C.
The relative magnitudes of cohesive forces in the liquid and adhesive forces between the liquid and its container
- D.
The amount of hydrogen bonding in the liquid
- E.
The volume of the liquid
- 12.What is the phase transition between solid to liquid?
- A.
Freezing
- B.
Melting
- C.
Depositing
- D.
Subliming
- E.
Vaporizing
- 13.A substance that expands to fill its container yet has a density approaching that of a liquid, and that can behave as a solvent is called a(n)
- A.
Plasma
- B.
Gas
- C.
Liquid
- D.
Amorphous solid
- E.
Supercritical fluid and gas
- 14.A substance whose triple point occurs at 222 K and 3.93 atm
- A.
Will melt rather than sublime at STP.
- B.
Will have a critical point of 211 K and 2.93 atm.
- C.
Will have a critical point of 233 K and 2.93 atm.
- D.
Will sublime rather than melt at STP.
- E.
Will not have a critical point.
- 15.A solid has a very high melting point, great hardness, and poor electrical conduction. This is a(n) ____________ solid.
- A.
Ionic
- B.
Molecular
- C.
Metallic
- D.
Covalent network
- E.
Both metallic and covalent network
- 16.Metallic solids do not exhibit __________.
- A.
Excellent thermal conductivity.
- B.
Excellent electrical conductivity.
- C.
Variable hardness.
- D.
Extreme brittleness
- E.
Variable melting point.
- 17.The heating curve shown was generated by measuring the heat flow and temperature for a solid as it was heated. The slope of the _____ segment corresponds to the heat capacity of the liquid of the substance.
- A.
AB
- B.
BC
- C.
CD
- D.
DE
- E.
EF
- 18.The heat flow into the sample in the segment ________ will yield the value of the Hvap of this substance.
- A.
AB
- B.
BC
- C.
CD
- D.
DE
- E.
EF
- 19.London dispersion forces result form the attraction between __________ and __________ dipoles.
- 20.What two types of molecules exhibit London dispersion forces? _____________
- 21.Viscosity is ___________________________.
- 22.X-Ray diffraction was used to make what important discovery?
- 23.What are two real life examples of uses for supercritical fluid extraction?
- 24.Three structures of C are ________, ___________, and ___________.
- 25.In which group of elements would all members be expected to have very similar chemical properties?
- A.
O, S, Se
- B.
N, O, F
- C.
Na, Mg, K
- D.
S, Se, Si
- E.
Na, Ne, Mg
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