SUBJECTS
|
BROWSE
|
CAREER CENTER
|
POPULAR
|
JOIN
|
LOGIN
Business Skills
|
Soft Skills
|
Basic Literacy
|
Certifications
About
|
Help
|
Privacy
|
Terms
|
Email
Search
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. In a closed system - when opposing changes are taking place at equal rates - the system is said to be in _____ _______.
boiling point
Charles law
dynamic equilibrium
moles (Le Chatelier's principle)
2. The enthalpy changes associated with the reactions that correspond to the formation of a substance from its free elements are called?
decomposition
equation of state
heats of formation
equivalent point
3. The solubility of gases in liquid or solid solvents always increases with ________ pressure.
limiting law
Le Chatelier's principle
increasing
isopiestic process (thermodynamics)
4. Rays made up of electrons in basic electron charges.
cathode rays
increases
single replacement/displacement
hydrolysis
5. Real gases act in a less than ideal way - especially under conditions of increased pressure and/or decreased temperture. Real gas behavior approaches that of ideal gases as the gas pressure becomes very low. The ideal gas is thus considered a _____ _
Boyles law
Charles law
activation energy
limiting law
6. The law stating that in any spontaneous process there is an increase in the entropy of the universe.
isothermal process (thermodynamics)
state (thermodynamics)
second law of thermodynamics
kinetic molecular theory
7. This process occurs when the system is maintained at the same temperature throughout an experiment.
enthalpy
electronegativity
high
isothermal process (thermodynamics)
8. For most substances - when a hot concentrated solution is cooled - the excess solid ________. This is useful in purification of the solute.
high
activation energy barrier (Le Chatelier's principle)
valence
crystallizes
9. Increase in the concentrations of reactants shifts the equilibrium to the ______ - thus increasing the amount of products formed.
Warning
: Invalid argument supplied for foreach() in
/var/www/html/basicversity.com/show_quiz.php
on line
183
10. A law stating that at a constant temperature - the volume of a gas in inversely proportiona to the pressure.
hydrolysis
Le Chatelier's principle
melting point
Boyles law
11. State ________ depend only on the present state of the substance and not on the path by which the present state was attained. Enthalpy - energy - Gibbs free energy - and entropy are examples.
negative
change in enthalpy
state functions (thermodynamics)
colligative property law
12. 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.
kinetic molecular theory
total pressure (Le Chatelier's principle)
increases
increases
13. In a closed system - when the rates of evaporation and condensation are equal - the system is in ____ ______.
end point
phase equilibrium
second law of thermodynamics
Avogrados law
14. The freezing point is always lowered by addition of solute.
freezing point depression
positive charge
emits (in atomic spectra)
Le Chatelier's principle
15. Another way the second law is stated is that in any spontaneous change - the amount of free energy available ______.
decreases
Valence Shell Electron Pair Repulsion (VSEPR)
titration
negative
16. A law that states that under conditions of constant temperature and pressure - equal volumes of different gases contain equal numbers of molecules.
...
irreversible and reversible processes
Avogrados law
double replacement/displacement
17. 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.
boiling point
electronegativity
equilibrium
state functions (thermodynamics)
18. The particular portion of the universe on which we wish to focus our attention. Everything else is called the surroundings.
increasing
electromotive force (emf)/ cell
reversible
system (thermodynamics)
19. A chemical reaction formed from the breakdown of a compound into its individual elements or compounds.
partial
reversible reaction
electromotive force (emf)/ cell
decomposition
20. If an inert gas is introduced into a reaction vessel containing other gases at equilibrium - it will cause an increase in the ______ _____ within the container - but the increase will not affect the position of equilibrium.
Warning
: Invalid argument supplied for foreach() in
/var/www/html/basicversity.com/show_quiz.php
on line
183
21. Because of the low intermolecular forces - the melting points are low and evaporation takes place so easily that it may occur at room temperature.
activation energy barrier (Le Chatelier's principle)
reversible reaction
Charles law
Van der Waals
22. 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.
Warning
: Invalid argument supplied for foreach() in
/var/www/html/basicversity.com/show_quiz.php
on line
183
23. In an endothermic process - energy is absorbed and ^E is _______.
sublimation
adiabatic process (thermodynamics)
positive
boiling point elevation
24. The temperature at which a substance's solid and liquid phases are in equilibrium.
increases
Raoults law
Charles law
melting point
25. The most active metals are found in what corner of the periodic table?
kinetic molecular theory
lower left corner
boiling point
heats of formation
26. Gases are composed of tiny - invisible molecules that are widely separated from one another in otherwise empty space.
enthalpy
combination
activation energy barrier (Le Chatelier's principle)
kinetic molecular theory
27. When solids are heated at certain perssures - some solids vaporize directly without passing through the liquid phase.
second law of thermodynamics
Boyles law
sublimation
dynamic equilibrium
28. **Five factors that affect reaction rates: 1. The nature of the reactants and products. 2. The surface area exposed. 3. The concentrations. 4. The temperature. 5. The catalyst.
catalysts
...
titration
saturated solution
29. A catalyst affects a chemical reaction by lowering the _____ _____ for both the forward and the reverse reactions equally.
catalysts
activation energy
isopiestic process (thermodynamics)
absorbs (in atomic spectra)
30. A catalyst lowers the ______ _____ _____ that must be overcome in order for the reaction to proceed. It merely speeds the approach to equilibrium but does not change Keq at all.
Warning
: Invalid argument supplied for foreach() in
/var/www/html/basicversity.com/show_quiz.php
on line
183
31. A law stating that at constant pressure - the volume of a given quantity of a gas varies directly with the temperature.
electromotive force (emf)/ cell
metallic
Charles law
heat capacity
32. The general shape of any molecule can be predicted from the number of bonding and non-bonding electron pairs in the valence shell of the central atom. nonbonded pairs of electrons (lone pairs) are more repellent than bonded pairs.
upper right corner
VSEPR
left (Le Chatelier's principle)
kinetic molecular theory
33. Liquids with strong attractive forces have ______ boiling points.
catalysts
high
titration
electromotive force (emf)/ cell
34. The pressure of a gas is the result of collisions between the gas molecules and the walls of the container.
pressure
activation energy barrier (Le Chatelier's principle)
first law of thermodynamics
kinetic molecular theory
35. This process occurs when the system is thermally isolated so that no heat enters or leaves.
...
adiabatic process (thermodynamics)
negative
Daltons law
36. The ______ of the system is some particular set of conditions of pressure - temperature - number of moles of each component - and their physical form (ex: gas - liquid - solid or crystalline form).
emits (in atomic spectra)
state (thermodynamics)
Boyles law
absorbs (in atomic spectra)
37. The most active nonmetals are found in what corner of the periodic table?
metallic
non-ideal
second law of thermodynamics
upper right corner
38. The pressure exerted by each gas in a mixture is called its _____ pressure.
crystallizes
partial
Raoults law
right (Le Chatelier's principle)
39. For a ________ reaction - the energy liberated in the exothermic reaction equals the energy absorbed in the endothermic reaction.
Charles law
Daltons law
reversible reaction
Valence Shell Electron Pair Repulsion (VSEPR)
40. 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.
Warning
: Invalid argument supplied for foreach() in
/var/www/html/basicversity.com/show_quiz.php
on line
183
41. **Proceeding across a period from left to right - the ionization energy _______.
third law of thermodynamics
boiling point elevation
increases
point particles
42. Electronegativities ________ from left to right in a period.
titration
isothermal process (thermodynamics)
increases
upper right corner
43. In a _______ expansion of a gas - the opposing pressure is virtually equal to the pressure exerted by the gas. It is ______ because any slight increase in the external pressure will reverse the process and cause compression to occure.
saturated solution
isopiestic process (thermodynamics)
pi bonds
reversible
44. **As we proceed to the right of the table - ______-forming properties decrease and _____-forming properties increase.
titration
negative
sublimation
base - acid
45. The molecules in a gas collide with one another - but the collisions are perfectly elastic (they result in no net loss of energy).
heats of formation
isopiestic process (thermodynamics)
activation energy barrier (Le Chatelier's principle)
kinetic molecular theory
46. Reactions that do not occur spontaneously can be forced to take place by supplying energy with an external current.
10 degrees
moles (Le Chatelier's principle)
electrolytic reactions
2
47. 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.
decreases
Charles law
Nernst equation
temperature
48. For a cell at concentrations and conditions other than standard - a potential can be calculated using this equation.
heat capacity
Raoult's law
Nernst equation
equation of state
49. The change in enthalpy of an endothermic reaction is ________.
non-ideal
melting point
positive
system (thermodynamics)
50. In titration - this point occurs when equal numbers of equivalents of acid and base have been reacted. The solution at this point is neutral because neither of the ions of the salt in solution undergoes hydrolysis.
ionization energy
specific heat
increases
equivalent point