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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. A chemical reaction where there is an actual exchange of partners to form new compounds. ex: AgNO3 + NaCl -> AgCl + NaNO3.
positive
double replacement/displacement
hybridyzation
decomposition
2. Cells that convert electrical energy into chemical energy.
positive
heat capacity
electrolytic cells
Charles law
3. A law stating that at constant pressure - the volume of a given quantity of a gas varies directly with the temperature.
increases
second law of thermodynamics
entropy
Charles law
4. The most active metals are found in what corner of the periodic table?
phase equilibrium
Avogrados law
combination
lower left corner
5. The law stating that in any spontaneous process there is an increase in the entropy of the universe.
activation energy barrier (Le Chatelier's principle)
second law of thermodynamics
state functions (thermodynamics)
decomposition
6. In an endothermic process - energy is absorbed and ^E is _______.
positive
Charles law
electrolytic reactions
saturated solution
7. 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).
temperature
kinetic molecular theory
hydrolysis
state (thermodynamics)
8. The heat change during a process carried out at a constant pressure.
change in enthalpy
total pressure (Le Chatelier's principle)
sublimation
combined gas law
9. The heat required to change 1mole of solid completely to vapor.
hydrolysis
molar heat of sublimation
increases
positive
10. A hypothetical gas would follow Boyles law under all conditions and is called?
isothermal process (thermodynamics)
kinetic molecular theory
enthalpy
ideal gas
11. A state function in which it is the heat content of a substance.
enthalpy
VSEPR
equivalent point
equilibrium
12. *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.
increases
isothermal process (thermodynamics)
lower left corner
wave mechanical model
13. Decreasing the concentrations of reactants shifts the equilibrium to the ______ - thus decreasing the concentration of products formed.
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14. Rays made up of positive electrodes in basic electron charges.
anode rays
phase equilibrium
end point
kinetic molecular theory
15. Reactions that do not occur spontaneously can be forced to take place by supplying energy with an external current.
increasing
upper right corner
electrolytic reactions
lower left corner
16. Liquids with strong attractive forces have ______ boiling points.
base - acid
titration
valence
high
17. The change in enthalpy of an endothermic reaction is ________.
base - acid
specific heat
positive
2
18. 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.
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19. 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.
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20. 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.
Raoults law
Daltons law
change in enthalpy
electrolytic cells
21. 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.
Van der Waals
positive
activation energy
increases
22. The molecules in a gas collide with one another - but the collisions are perfectly elastic (they result in no net loss of energy).
dynamic equilibrium
...
ideal gas
kinetic molecular theory
23. 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.
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24. 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.
standard atmospheric pressure
dynamic equilibrium
Valence Shell Electron Pair Repulsion (VSEPR)
combined gas law
25. *The hypothetical ideal gas obeys exactly the mathematical statement of the ideal gas law. This statement is also called the _____ ___ ____ of an ideal gas because it relates the variables (P - V - n - T) that specify properties of the gas.
equation of state
positive
vapor pressure
Le Chatelier's principle
26. A process that occurs whent eh system is maintained at constant pressure.
kinetic molecular theory
zero
non-ideal
isopiestic process (thermodynamics)
27. The pressure of a gas is the result of collisions between the gas molecules and the walls of the container.
change in enthalpy
Van der Waals
kinetic molecular theory
saturated solution
28. A pure crystal of elemental metal consists of roughly Avogrado's number of atoms held together by ________ bonds.
high
electrolytic reactions
metallic
heats of formation
29. The particular portion of the universe on which we wish to focus our attention. Everything else is called the surroundings.
upper right corner
catalysts
electromotive force (emf)/ cell
system (thermodynamics)
30. Deviations from Boyles law that occur with real gases represent _______ behavior.
Le Chatelier's principle
non-ideal
reversible
Le Chatelier's principle
31. A chemical reaction formed from the breakdown of a compound into its individual elements or compounds.
ionization energy
electrolytic reactions
adiabatic process (thermodynamics)
decomposition
32. A catalyst affects a chemical reaction by lowering the _____ _____ for both the forward and the reverse reactions equally.
Daltons law
high
activation energy
enthalpy
33. The vapor pressure increases with increasing _____.
metallic
negative
temperature
irreversible and reversible processes
34. *The temperature affects chemical reactions with an increase of ___degrees C above room temperature - causing the reaction rate to double.
10 degrees
Raoult's law
...
cathode rays
35. When solids are heated at certain perssures - some solids vaporize directly without passing through the liquid phase.
reversible reaction
phase equilibrium
specific heat
sublimation
36. When the electron moves from the ground state to an excited state - it ______ energy.
bohr model
absorbs (in atomic spectra)
hydrolysis
Van der Waals
37. Metals have electronegativities less than ____
third law of thermodynamics
kinetic molecular theory
2
Le Chatelier's principle
38. _____ bonds are present in molecules containing double or triple bonds.
negative
high
dynamic equilibrium
pi bonds
39. The amount of heat energy required to raise the temperature of a given quantity of a substance one degree celcius.
Valence Shell Electron Pair Repulsion (VSEPR)
state functions (thermodynamics)
heat capacity
heats of formation
40. **As we proceed to the right of the table - ______-forming properties decrease and _____-forming properties increase.
irreversible and reversible processes
Van der Waals
third law of thermodynamics
base - acid
41. A law stating that at a constant temperature - the volume of a gas in inversely proportiona to the pressure.
Boyles law
point particles
melting point
standard atmospheric pressure
42. 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.
Charles law
adiabatic process (thermodynamics)
point particles
sublimation
43. In a closed system - when the rates of evaporation and condensation are equal - the system is in ____ ______.
total pressure (Le Chatelier's principle)
Valence Shell Electron Pair Repulsion (VSEPR)
phase equilibrium
electronegativity
44. The freezing point - boiling point - and vapor pressure of a solution differ from those of the pure solvent by amounts which are directly proportional to the molal concentration of the solute.
boiling point elevation
emits (in atomic spectra)
colligative property law
non-ideal
45. 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.
first law of thermodynamics
electronegativity
reversible
increases
46. A law that states that under conditions of constant temperature and pressure - equal volumes of different gases contain equal numbers of molecules.
Van der Waals
Avogrados law
emits (in atomic spectra)
Le Chatelier's principle
47. *The surface area exposed affect chemical reactions because most reactions depend on the reactants coming into contact - increasing the rate of the reaction.
catalysts
increases
saturated solution
...
48. Gases are composed of tiny - invisible molecules that are widely separated from one another in otherwise empty space.
heat capacity
activation energy
left - right (Le Chatelier's principle)
kinetic molecular theory
49. A theory of the hydrogen atom stating that the electron can exist in only certain stable energy levels and that when the electronic state of the atom changes - it must absorb or emit exactly that amound of energy equal to the difference betweent he f
negative
bohr model
equation of state
Van der Waals
50. A solution in which solid solute is in equilibrium with dissolved solute.
valence
adiabatic process (thermodynamics)
saturated solution
combined gas law