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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 action of salts of weak acids or bases with water to form acidic or basic solutions.
ideal gas
hydrolysis
freezing point depression
...
2. Rays made up of electrons in basic electron charges.
cathode rays
decomposition
combination
Le Chatelier's principle
3. _____ bonds are present in molecules containing double or triple bonds.
pi bonds
Le Chatelier's principle
...
partial
4. Metals have electronegativities less than ____
increases
temperature
sublimation
2
5. A law that states that under conditions of constant temperature and pressure - equal volumes of different gases contain equal numbers of molecules.
left (Le Chatelier's principle)
...
Avogrados law
reversible reaction
6. 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.
state functions (thermodynamics)
electronegativity
Charles law
first law of thermodynamics
7. Deviations from Boyles law that occur with real gases represent _______ behavior.
end point
non-ideal
equivalent point
Le Chatelier's principle
8. Increase in the concentrations of reactants shifts the equilibrium to the ______ - thus increasing the amount of products formed.
9. A chemical reaction where one substance is displacing another. ex: Fe + CuSo4 -> FeSo4 + Cu.
state (thermodynamics)
single replacement/displacement
VSEPR
absorbs (in atomic spectra)
10. This process occurs when the system is thermally isolated so that no heat enters or leaves.
adiabatic process (thermodynamics)
kinetic molecular theory
Van der Waals
double replacement/displacement
11. This process occurs when the system is maintained at the same temperature throughout an experiment.
isothermal process (thermodynamics)
third law of thermodynamics
Avogrados law
Le Chatelier's principle
12. **Proceeding across a period from left to right - the ionization energy _______.
standard atmospheric pressure
saturated solution
increases
vapor pressure
13. For a cell at concentrations and conditions other than standard - a potential can be calculated using this equation.
Nernst equation
emits (in atomic spectra)
Valence Shell Electron Pair Repulsion (VSEPR)
high
14. When the rate of evaporation equals the rate of condensation - the system is in __________.
Charles law
equilibrium
crystallizes
negative
15. A law that states that for a given mass of gas - the volume is proportional to the pressure and absolute temperature.
boiling point
combined gas law
Raoults law
phase equilibrium
16. The temperature at which a substance's solid and liquid phases are in equilibrium.
upper right corner
melting point
zero
heat capacity
17. Any spontaneous change in a chemical reaction will decrease the amount of free energy toward _______ as the process proceeds towards equilibrium.
total pressure (Le Chatelier's principle)
zero
hybridyzation
heats of formation
18. The degree of randomness of a system is represented by a thermodynamic quantity called? the greater the randomness - the greater the _______.
entropy
kinetic molecular theory
freezing point depression
hybridyzation
19. Decreasing the concentrations of reactants shifts the equilibrium to the ______ - thus decreasing the concentration of products formed.
20. A process that occurs whent eh system is maintained at constant pressure.
reversible
second law of thermodynamics
Nernst equation
isopiestic process (thermodynamics)
21. 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 _____ _
decomposition
Le Chatelier's principle
sublimation
limiting law
22. The law stating that change in internal energy is equal to the difference between the energy supplied toi the system as heat and the energy removed from the system as work performed on the surroundings.
crystallizes
right (Le Chatelier's principle)
first law of thermodynamics
left - right (Le Chatelier's principle)
23. Rays made up of positive electrodes in basic electron charges.
anode rays
isothermal process (thermodynamics)
decomposition
equation of state
24. Electronegativities ________ from left to right in a period.
boiling point
increases
...
decomposition
25. When an electron moves from an excited state to the ground state - it _______ energy.
total pressure (Le Chatelier's principle)
emits (in atomic spectra)
electrolytic reactions
reversible reaction
26. In a closed system - when the rates of evaporation and condensation are equal - the system is in ____ ______.
moles (Le Chatelier's principle)
right (Le Chatelier's principle)
phase equilibrium
kinetic molecular theory
27. When the electron moves from the ground state to an excited state - it ______ energy.
...
moles (Le Chatelier's principle)
absorbs (in atomic spectra)
system (thermodynamics)
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.
...
state (thermodynamics)
heat capacity
crystallizes
29. 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.
second law of thermodynamics
right (Le Chatelier's principle)
kinetic molecular theory
freezing point depression
30. 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
dynamic equilibrium
hybridyzation
ideal gas
irreversible and reversible processes
31. The molecules in a gas collide with one another - but the collisions are perfectly elastic (they result in no net loss of energy).
zero
kinetic molecular theory
pressure
Nernst equation
32. The law stating that in any spontaneous process there is an increase in the entropy of the universe.
temperature
upper right corner
decreases
second law of thermodynamics
33. A principle stating that when a system at equilibrium is disturbed by the application of a stress (change in temperature - pressure - or concentration) it reacts to minimize the stress and attain a new equilibrium position.
34. The energy required to remove an electron from an isolated atom in its ground state.
ionization energy
activation energy
state functions (thermodynamics)
negative
35. *The surface area exposed affect chemical reactions because most reactions depend on the reactants coming into contact - increasing the rate of the reaction.
anode rays
increases
...
kinetic molecular theory
36. 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.
37. 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.
state functions (thermodynamics)
titration
specific heat
electronegativity
38. 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
Charles law
bohr model
ionization energy
increases
39. The vapor pressure of an aqueous solution is always lowered by the additon of more solute - which causes the boiling point to be raised.
boiling point elevation
activation energy barrier (Le Chatelier's principle)
melting point
positive charge
40. 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.
negative
equation of state
equivalent point
Avogrados law
41. The heat required to change 1mole of solid completely to vapor.
reversible reaction
molar heat of sublimation
equivalent point
Raoult's law
42. In an exothermic process - energy is released and ^E of reaction is ________.
enthalpy
negative
...
isothermal process (thermodynamics)
43. _______ has very little effect on the solubility of liquids or solids in liquid solvents.
left - right (Le Chatelier's principle)
Le Chatelier's principle
reversible
pressure
44. 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.
45. The molecules in a gas are in constant - continueous - random - and straight-line motion.
phase equilibrium
kinetic molecular theory
cathode rays
total pressure (Le Chatelier's principle)
46. Heat added to a system and work done by a system are considered _________ quantities.
activation energy
positive
saturated solution
high
47. *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.
reversible reaction
isothermal process (thermodynamics)
wave mechanical model
high
48. The particular portion of the universe on which we wish to focus our attention. Everything else is called the surroundings.
system (thermodynamics)
hybridyzation
increases
crystallizes
49. The process of mixing different orbitals of the same atom to form a new set of equivalent orbitals.
metallic
hybridyzation
increases
Le Chatelier's principle
50. 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.
third law of thermodynamics
increases
catalysts
kinetic molecular theory