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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 amount of heat energy required to raise the temperature 1g of a substance by 1 degree celcius.
specific heat
single replacement/displacement
increases
combination
2. The heat required to change 1mole of solid completely to vapor.
Avogrados law
change in enthalpy
2
molar heat of sublimation
3. 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.
combination
reversible
...
Avogrados law
4. A solution in which solid solute is in equilibrium with dissolved solute.
total pressure (Le Chatelier's principle)
boiling point elevation
kinetic molecular theory
saturated solution
5. When an electron moves from an excited state to the ground state - it _______ energy.
point particles
kinetic molecular theory
emits (in atomic spectra)
boiling point elevation
6. When solids are heated at certain perssures - some solids vaporize directly without passing through the liquid phase.
kinetic molecular theory
Le Chatelier's principle
sublimation
decomposition
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).
emits (in atomic spectra)
state (thermodynamics)
Valence Shell Electron Pair Repulsion (VSEPR)
base - acid
8. 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.
...
boiling point elevation
crystallizes
Daltons law
9. Metals have electronegativities less than ____
non-ideal
freezing point depression
2
Le Chatelier's principle
10. 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 _____ _
combined gas law
limiting law
kinetic molecular theory
melting point
11. 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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12. *The temperature affects chemical reactions with an increase of ___degrees C above room temperature - causing the reaction rate to double.
2
10 degrees
melting point
...
13. Reactions that do not occur spontaneously can be forced to take place by supplying energy with an external current.
electrolytic reactions
heat capacity
ideal gas
Le Chatelier's principle
14. Any spontaneous change in a chemical reaction will decrease the amount of free energy toward _______ as the process proceeds towards equilibrium.
Charles law
zero
Raoult's law
lower left corner
15. 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.
saturated solution
positive
positive charge
equivalent point
16. A law that states that for a given mass of gas - the volume is proportional to the pressure and absolute temperature.
Le Chatelier's principle
...
combined gas law
Van der Waals
17. 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
third law of thermodynamics
bohr model
point particles
adiabatic process (thermodynamics)
18. *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.
Charles law
wave mechanical model
kinetic molecular theory
boiling point
19. A law stating that at a constant temperature - the volume of a gas in inversely proportiona to the pressure.
Boyles law
enthalpy
heat capacity
VSEPR
20. **Proceeding across a period from left to right - the ionization energy _______.
second law of thermodynamics
increases
...
electromotive force (emf)/ cell
21. The change in enthalpy of an endothermic reaction is ________.
combined gas law
positive charge
boiling point
positive
22. The force with which the electrons flow from the negative electrode to the positive electrode through an external wire is called?
equilibrium
moles (Le Chatelier's principle)
electromotive force (emf)/ cell
second law of thermodynamics
23. Electronegativities ________ from left to right in a period.
...
increases
kinetic molecular theory
Charles law
24. Heat added to a system and work done by a system are considered _________ quantities.
dynamic equilibrium
...
positive
kinetic molecular theory
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.
hybridyzation
equation of state
temperature
increases
26. 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.
Raoults law
hybridyzation
bohr model
colligative property law
27. Decreasing the concentrations of reactants shifts the equilibrium to the ______ - thus decreasing the concentration of products formed.
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28. The law stating that in any spontaneous process there is an increase in the entropy of the universe.
colligative property law
second law of thermodynamics
hydrolysis
state (thermodynamics)
29. The most active metals are found in what corner of the periodic table?
single replacement/displacement
melting point
lower left corner
Charles law
30. When the rate of evaporation equals the rate of condensation - the system is in __________.
Nernst equation
equilibrium
increases
...
31. The vapor pressure increases with increasing _____.
dynamic equilibrium
temperature
single replacement/displacement
positive
32. In titration - this is the point at which a particular indicator changes color.
end point
reversible reaction
entropy
freezing point depression
33. **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.
Nernst equation
Valence Shell Electron Pair Repulsion (VSEPR)
saturated solution
...
34. 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.
catalysts
Valence Shell Electron Pair Repulsion (VSEPR)
Charles law
reversible reaction
35. Gases are composed of tiny - invisible molecules that are widely separated from one another in otherwise empty space.
negative
enthalpy
VSEPR
kinetic molecular theory
36. Another way the second law is stated is that in any spontaneous change - the amount of free energy available ______.
decreases
Van der Waals
electromotive force (emf)/ cell
kinetic molecular theory
37. 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.
first law of thermodynamics
total pressure (Le Chatelier's principle)
Le Chatelier's principle
positive
38. A law stating that at constant pressure - the volume of a given quantity of a gas varies directly with the temperature.
Charles law
positive
single replacement/displacement
activation energy barrier (Le Chatelier's principle)
39. The molecules in a gas are in constant - continueous - random - and straight-line motion.
kinetic molecular theory
heat capacity
enthalpy
titration
40. A law that states that under conditions of constant temperature and pressure - equal volumes of different gases contain equal numbers of molecules.
second law of thermodynamics
left (Le Chatelier's principle)
...
Avogrados law
41. A state function in which it is the heat content of a substance.
left (Le Chatelier's principle)
enthalpy
Van der Waals
high
42. The pressure exerted by the gas molecules when they are in equilibrium with the liquid.
entropy
activation energy
state functions (thermodynamics)
vapor pressure
43. Increase in the concentrations of reactants shifts the equilibrium to the ______ - thus increasing the amount of products formed.
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44. The pressure exerted by each gas in a mixture is called its _____ pressure.
partial
limiting law
upper right corner
2
45. The pressure of a gas is the result of collisions between the gas molecules and the walls of the container.
anode rays
kinetic molecular theory
...
high
46. 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.
partial
Raoults law
state functions (thermodynamics)
non-ideal
47. 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.
emits (in atomic spectra)
electronegativity
colligative property law
high
48. When the electron moves from the ground state to an excited state - it ______ energy.
Boyles law
boiling point
absorbs (in atomic spectra)
phase equilibrium
49. *The surface area exposed affect chemical reactions because most reactions depend on the reactants coming into contact - increasing the rate of the reaction.
positive
boiling point
...
pi bonds
50. Rays made up of electrons in basic electron charges.
VSEPR
heat capacity
cathode rays
specific heat