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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. 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.
Charles law
combined gas law
electronegativity
ionization energy
2. The molecules in a gas are in constant - continueous - random - and straight-line motion.
increases
kinetic molecular theory
first law of thermodynamics
electromotive force (emf)/ cell
3. A law stating that at constant pressure - the volume of a given quantity of a gas varies directly with the temperature.
end point
Charles law
decreases
10 degrees
4. The vapor pressure increases with increasing _____.
anode rays
temperature
heat capacity
combined gas law
5. Liquids with strong attractive forces have ______ boiling points.
electromotive force (emf)/ cell
high
non-ideal
left - right (Le Chatelier's principle)
6. Gases are composed of tiny - invisible molecules that are widely separated from one another in otherwise empty space.
boiling point
single replacement/displacement
kinetic molecular theory
irreversible and reversible processes
7. In a closed system - when opposing changes are taking place at equal rates - the system is said to be in _____ _______.
Van der Waals
dynamic equilibrium
increasing
combination
8. Rays made up of electrons in basic electron charges.
10 degrees
cathode rays
ionization energy
anode rays
9. *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.
Avogrados law
kinetic molecular theory
phase equilibrium
wave mechanical model
10. *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.
kinetic molecular theory
equation of state
electromotive force (emf)/ cell
single replacement/displacement
11. 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)
kinetic molecular theory
positive
Van der Waals
12. 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).
kinetic molecular theory
increases
equilibrium
state (thermodynamics)
13. 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
ionization energy
electrolytic cells
heat capacity
14. Reactions that do not occur spontaneously can be forced to take place by supplying energy with an external current.
left (Le Chatelier's principle)
electrolytic reactions
decreases
Van der Waals
15. 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.
increases
dynamic equilibrium
Daltons law
electrolytic cells
16. The maximum work derived from any change will be obtained only if the process is carried out in a reversible manner. All real - spontaneous changes are therefore not reversible - and the work that can be derived from an irreversible change is alway l
irreversible and reversible processes
Valence Shell Electron Pair Repulsion (VSEPR)
reversible reaction
third law of thermodynamics
17. A law that states that for a given mass of gas - the volume is proportional to the pressure and absolute temperature.
first law of thermodynamics
colligative property law
emits (in atomic spectra)
combined gas law
18. The process of mixing different orbitals of the same atom to form a new set of equivalent orbitals.
electromotive force (emf)/ cell
left (Le Chatelier's principle)
hybridyzation
double replacement/displacement
19. For most substances - when a hot concentrated solution is cooled - the excess solid ________. This is useful in purification of the solute.
vapor pressure
decreases
crystallizes
heat capacity
20. The force with which the electrons flow from the negative electrode to the positive electrode through an external wire is called?
cathode rays
electromotive force (emf)/ cell
single replacement/displacement
combined gas law
21. An increase in temperature causes the position of equilibrium of an exothermic reaction to be shifted to the _____ - while that of and endothermic reactions is shifted to the _______.
22. The amount of heat energy required to raise the temperature of a given quantity of a substance one degree celcius.
heat capacity
state functions (thermodynamics)
Charles law
temperature
23. The most active nonmetals are found in what corner of the periodic table?
upper right corner
decomposition
hydrolysis
left - right (Le Chatelier's principle)
24. The temperature at which the pressure of vapor escaping from the liquid equals atmospheric pressure.
boiling point
dynamic equilibrium
molar heat of sublimation
electrolytic cells
25. Another way the second law is stated is that in any spontaneous change - the amount of free energy available ______.
first law of thermodynamics
standard atmospheric pressure
decreases
electromotive force (emf)/ cell
26. When the rate of evaporation equals the rate of condensation - the system is in __________.
positive
equilibrium
metallic
Charles law
27. *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
high
zero
...
valence
28. 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.
29. In a closed system - when the rates of evaporation and condensation are equal - the system is in ____ ______.
phase equilibrium
cathode rays
electromotive force (emf)/ cell
combined gas law
30. *The nature of the reactants and products affect chemical reactions because some elements and compounds have bonds that when broken/formed - react more rapidly with each other than others.
...
state functions (thermodynamics)
valence
base - acid
31. The change in enthalpy of an exothermic reaction is ________.
negative
upper right corner
left (Le Chatelier's principle)
ionization energy
32. The _____ speed up the rate of a chemical reaction but do not change the equilibrium constant - it simply speeds up the rate of approach to equilibrium.
dynamic equilibrium
total pressure (Le Chatelier's principle)
catalysts
high
33. A chemical reaction formed from the union of its elements.
Van der Waals
negative
combination
left (Le Chatelier's principle)
34. 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.
activation energy barrier (Le Chatelier's principle)
double replacement/displacement
sublimation
VSEPR
35. Electronegativities _______ as you go down a group.
positive
anode rays
colligative property law
decreases
36. A process that occurs whent eh system is maintained at constant pressure.
2
Raoult's law
positive
isopiestic process (thermodynamics)
37. Metals have electronegativities less than ____
2
decreases
electronegativity
enthalpy
38. 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.
39. 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 _____ _
limiting law
molar heat of sublimation
single replacement/displacement
double replacement/displacement
40. For a cell at concentrations and conditions other than standard - a potential can be calculated using this equation.
state (thermodynamics)
Charles law
Nernst equation
change in enthalpy
41. In titration - this is the point at which a particular indicator changes color.
end point
standard atmospheric pressure
2
isopiestic process (thermodynamics)
42. 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.
hydrolysis
upper right corner
negative
equivalent point
43. 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.
44. Heat added to a system and work done by a system are considered _________ quantities.
limiting law
pressure
positive
phase equilibrium
45. The action of salts of weak acids or bases with water to form acidic or basic solutions.
Van der Waals
right (Le Chatelier's principle)
hydrolysis
end point
46. Increase in the concentrations of reactants shifts the equilibrium to the ______ - thus increasing the amount of products formed.
47. When a hydrogen atom is bonded to a highly electronegative atom - it will become partially _____-charged - and will be attracted to neighboring electron pairs. This creates a hydrogen bond. The more polar the molecule - the more effective the hydroge
positive
negative
positive charge
kinetic molecular theory
48. When solids are heated at certain perssures - some solids vaporize directly without passing through the liquid phase.
sublimation
enthalpy
single replacement/displacement
end point
49. A chemical reaction where there is an actual exchange of partners to form new compounds. ex: AgNO3 + NaCl -> AgCl + NaNO3.
right (Le Chatelier's principle)
double replacement/displacement
wave mechanical model
kinetic molecular theory
50. The solubility of gases in liquid or solid solvents always increases with ________ pressure.
increasing
kinetic molecular theory
decreases
third law of thermodynamics