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Test your basic knowledge |
CLEP Chemistry 1
Start Test
Study First
Subjects
:
clep
,
science
,
chemistry
Instructions:
Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can
study here
.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. This law states that the total pressure exerted by a mixture of gases is equal to the sum of the partial pressures of the gases in mixture.
Daltons law
isothermal process (thermodynamics)
right (Le Chatelier's principle)
moles (Le Chatelier's principle)
2. The temperature at which the pressure of vapor escaping from the liquid equals atmospheric pressure.
moles (Le Chatelier's principle)
Boyles law
boiling point
left - right (Le Chatelier's principle)
3. In an exothermic process - energy is released and ^E of reaction is ________.
reversible
positive charge
negative
sublimation
4. The relatively weak attractive forces between molecules that are apparent only when the molecules approach one another closely (usually at low temperatures and high pressure).
activation energy barrier (Le Chatelier's principle)
decreases
specific heat
Van der Waals
5. Heat added to a system and work done by a system are considered _________ quantities.
colligative property law
positive
crystallizes
boiling point elevation
6. *Each wave function corresponds to a certain electron energy and describes a region about the nucleus (orbital) where an electron having that energy may be found.
hybridyzation
Raoults law
wave mechanical model
increasing
7. Any spontaneous change in a chemical reaction will decrease the amount of free energy toward _______ as the process proceeds towards equilibrium.
zero
left (Le Chatelier's principle)
Le Chatelier's principle
pressure
8. When a system at equilibrium is disturbed by adding or removing one of hte substances - all the concentrations will change until a new equilibrium point is reached with the same value of Keq.
9. When solids are heated at certain perssures - some solids vaporize directly without passing through the liquid phase.
Van der Waals
Van der Waals
combination
sublimation
10. The action of salts of weak acids or bases with water to form acidic or basic solutions.
irreversible and reversible processes
equation of state
change in enthalpy
hydrolysis
11. This law states that the entropy of any pure - perfect crystal at absolute zero is equal to zero.
system (thermodynamics)
second law of thermodynamics
activation energy
third law of thermodynamics
12. A chemical reaction where there is an actual exchange of partners to form new compounds. ex: AgNO3 + NaCl -> AgCl + NaNO3.
enthalpy
decomposition
10 degrees
double replacement/displacement
13. A valence theory that permits the geometric arrangement of atoms - or groups of atoms - about some central atom to be determined solely by considering the repulsions between the electron pairs present in the valence shell of the central atom.
cathode rays
Valence Shell Electron Pair Repulsion (VSEPR)
titration
increases
14. The amount of heat energy required to raise the temperature 1g of a substance by 1 degree celcius.
specific heat
end point
equilibrium
electrolytic reactions
15. The average kinetic energy of all the molecules collectively is directly proportional to the absolute temperature of the gas. The average kinetic energy of equal numbers of molecules of any gas is the same at the same temperature.
Le Chatelier's principle
right (Le Chatelier's principle)
kinetic molecular theory
emits (in atomic spectra)
16. The molecules in a gas collide with one another - but the collisions are perfectly elastic (they result in no net loss of energy).
phase equilibrium
kinetic molecular theory
activation energy
wave mechanical model
17. For a ________ reaction - the energy liberated in the exothermic reaction equals the energy absorbed in the endothermic reaction.
Van der Waals
reversible reaction
vapor pressure
single replacement/displacement
18. Electronegativities ________ from left to right in a period.
moles (Le Chatelier's principle)
increases
double replacement/displacement
increasing
19. *The Concentration usually _____ the chemical reaction rate with increasing concentrations of the reactants.
non-ideal
crystallizes
increases
boiling point elevation
20. Rays made up of positive electrodes in basic electron charges.
first law of thermodynamics
increases
anode rays
activation energy
21. When an electron moves from an excited state to the ground state - it _______ energy.
increases
specific heat
emits (in atomic spectra)
valence
22. The vapor pressure increases with increasing _____.
temperature
VSEPR
decomposition
high
23. For most substances - when a hot concentrated solution is cooled - the excess solid ________. This is useful in purification of the solute.
Boyles law
Nernst equation
crystallizes
electronegativity
24. The process of mixing different orbitals of the same atom to form a new set of equivalent orbitals.
positive charge
hybridyzation
point particles
equation of state
25. This is due to the way positive charges of one molecule attract the negative charges of another molecule. Compounds of the solid state that are bound mainly by this type of attractive have soft crystals - are easily deformed - and vaporize easily.
freezing point depression
Van der Waals
system (thermodynamics)
limiting law
26. Electronegativities _______ as you go down a group.
third law of thermodynamics
pressure
wave mechanical model
decreases
27. The temperature at which a substance's solid and liquid phases are in equilibrium.
equation of state
emits (in atomic spectra)
melting point
isothermal process (thermodynamics)
28. _____ bonds are present in molecules containing double or triple bonds.
pi bonds
decreases
Avogrados law
Charles law
29. If this law was strictly obeyed - gases would not condense when they are cooled. This means that gases behave in an ideal fashion only at relatively high temperatures and low pressures.
positive
Charles law
phase equilibrium
partial
30. This process occurs when the system is thermally isolated so that no heat enters or leaves.
adiabatic process (thermodynamics)
left (Le Chatelier's principle)
boiling point elevation
hybridyzation
31. A law that states that for a given mass of gas - the volume is proportional to the pressure and absolute temperature.
Avogrados law
kinetic molecular theory
combined gas law
electronegativity
32. *The electrons found in the outermost shell are called _____ electrons. When these electrons are lost or partially lost through sharing - the oxidation state is assigned a positive value for the element. If valence electrons are gained or partially g
kinetic molecular theory
lower left corner
valence
adiabatic process (thermodynamics)
33. The change in enthalpy of an exothermic reaction is ________.
negative
melting point
Valence Shell Electron Pair Repulsion (VSEPR)
Le Chatelier's principle
34. A hypothetical gas would follow Boyles law under all conditions and is called?
system (thermodynamics)
boiling point elevation
ideal gas
kinetic molecular theory
35. A law stating that at constant pressure - the volume of a given quantity of a gas varies directly with the temperature.
left (Le Chatelier's principle)
Charles law
temperature
Van der Waals
36. In a closed system - when the rates of evaporation and condensation are equal - the system is in ____ ______.
phase equilibrium
Charles law
crystallizes
pressure
37. For a solution in which a nonvolatile solute is dissolved in a solvent - the vapor pressure is due only to the vapor of the solvent above the solution. This vapor pressure is given by _______ law.
38. The pressure exerted by each gas in a mixture is called its _____ pressure.
change in enthalpy
partial
melting point
electrolytic reactions
39. Liquids with strong attractive forces have ______ boiling points.
enthalpy
high
10 degrees
boiling point elevation
40. The process of determining the amount of a solution of known concentration that is required to react completely with a certain amount of a sample that is being analyzed.
titration
absorbs (in atomic spectra)
isopiestic process (thermodynamics)
sublimation
41. The most active metals are found in what corner of the periodic table?
lower left corner
hybridyzation
total pressure (Le Chatelier's principle)
decreases
42. The amount of heat energy required to raise the temperature of a given quantity of a substance one degree celcius.
Boyles law
heat capacity
activation energy barrier (Le Chatelier's principle)
increasing
43. The ________ of an element is a number that measerures the relative strength in which the atoms of the element attract valence electrons in a chemical bond - on a scale of 0-4.
freezing point depression
kinetic molecular theory
electronegativity
electromotive force (emf)/ cell
44. *The surface area exposed affect chemical reactions because most reactions depend on the reactants coming into contact - increasing the rate of the reaction.
sublimation
...
absorbs (in atomic spectra)
ideal gas
45. The pressure exerted by the gas molecules when they are in equilibrium with the liquid.
electronegativity
vapor pressure
Raoult's law
freezing point depression
46. A pure crystal of elemental metal consists of roughly Avogrado's number of atoms held together by ________ bonds.
sublimation
third law of thermodynamics
Le Chatelier's principle
metallic
47. A catalyst affects a chemical reaction by lowering the _____ _____ for both the forward and the reverse reactions equally.
wave mechanical model
activation energy
double replacement/displacement
activation energy barrier (Le Chatelier's principle)
48. In an endothermic process - energy is absorbed and ^E is _______.
kinetic molecular theory
VSEPR
Nernst equation
positive
49. Deviations from Boyles law that occur with real gases represent _______ behavior.
activation energy barrier (Le Chatelier's principle)
non-ideal
bohr model
total pressure (Le Chatelier's principle)
50. Increasing the pressure on a system at equilibrium will cause a shift in the position of equilibrium in the direction of the fewest number of ______ of gaseous reactants or products.