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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 formed from the breakdown of a compound into its individual elements or compounds.
end point
moles (Le Chatelier's principle)
decomposition
heat capacity
2. The normal boiling point of a liquid is the temperature at which its vapor pressure is 760mm Hg.
Nernst equation
standard atmospheric pressure
Raoults law
Charles law
3. 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.
equation of state
negative
melting point
Van der Waals
4. 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
saturated solution
...
irreversible and reversible processes
single replacement/displacement
5. 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
zero
double replacement/displacement
specific heat
6. The temperature at which the pressure of vapor escaping from the liquid equals atmospheric pressure.
boiling point
electrolytic cells
ideal gas
Van der Waals
7. For a ________ reaction - the energy liberated in the exothermic reaction equals the energy absorbed in the endothermic reaction.
hydrolysis
zero
reversible reaction
increasing
8. In an endothermic process - energy is absorbed and ^E is _______.
upper right corner
VSEPR
positive
left (Le Chatelier's principle)
9. 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.
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10. *The temperature affects chemical reactions with an increase of ___degrees C above room temperature - causing the reaction rate to double.
dynamic equilibrium
partial
Avogrados law
10 degrees
11. 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)
specific heat
Le Chatelier's principle
12. Heat added to a system and work done by a system are considered _________ quantities.
boiling point
increases
10 degrees
positive
13. In an exothermic process - energy is released and ^E of reaction is ________.
decreases
negative
electromotive force (emf)/ cell
molar heat of sublimation
14. Increase in the concentrations of reactants shifts the equilibrium to the ______ - thus increasing the amount of products formed.
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15. Rays made up of positive electrodes in basic electron charges.
electrolytic reactions
state functions (thermodynamics)
anode rays
change in enthalpy
16. *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.
Nernst equation
increases
standard atmospheric pressure
wave mechanical model
17. The energy required to remove an electron from an isolated atom in its ground state.
ionization energy
change in enthalpy
standard atmospheric pressure
titration
18. A catalyst affects a chemical reaction by lowering the _____ _____ for both the forward and the reverse reactions equally.
state functions (thermodynamics)
Nernst equation
increases
activation energy
19. The heat required to change 1mole of solid completely to vapor.
cathode rays
molar heat of sublimation
kinetic molecular theory
right (Le Chatelier's principle)
20. Cells that convert electrical energy into chemical energy.
Le Chatelier's principle
electrolytic cells
electronegativity
temperature
21. A law that states that for a given mass of gas - the volume is proportional to the pressure and absolute temperature.
combined gas law
Van der Waals
Charles law
limiting law
22. 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.
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23. Metals have electronegativities less than ____
Le Chatelier's principle
positive
2
Daltons law
24. 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.
isothermal process (thermodynamics)
Raoults law
first law of thermodynamics
electromotive force (emf)/ cell
25. The molecules in a gas collide with one another - but the collisions are perfectly elastic (they result in no net loss of energy).
limiting law
point particles
kinetic molecular theory
state (thermodynamics)
26. For most substances - when a hot concentrated solution is cooled - the excess solid ________. This is useful in purification of the solute.
electronegativity
ionization energy
high
crystallizes
27. Decreasing the concentrations of reactants shifts the equilibrium to the ______ - thus decreasing the concentration of products formed.
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28. The degree of randomness of a system is represented by a thermodynamic quantity called? the greater the randomness - the greater the _______.
Avogrados law
Raoults law
entropy
change in enthalpy
29. 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.
state functions (thermodynamics)
cathode rays
Charles law
activation energy barrier (Le Chatelier's principle)
30. A law that states that under conditions of constant temperature and pressure - equal volumes of different gases contain equal numbers of molecules.
Avogrados law
upper right corner
state functions (thermodynamics)
electrolytic cells
31. *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
electrolytic reactions
valence
Raoult's law
decomposition
32. The amount of heat energy required to raise the temperature 1g of a substance by 1 degree celcius.
specific heat
pressure
increases
combination
33. 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.
Daltons law
single replacement/displacement
entropy
titration
34. *The Concentration usually _____ the chemical reaction rate with increasing concentrations of the reactants.
entropy
increases
Nernst equation
kinetic molecular theory
35. The force with which the electrons flow from the negative electrode to the positive electrode through an external wire is called?
left (Le Chatelier's principle)
hydrolysis
electromotive force (emf)/ cell
isopiestic process (thermodynamics)
36. 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.
titration
colligative property law
right (Le Chatelier's principle)
ideal gas
37. In titration - this is the point at which a particular indicator changes color.
increases
left - right (Le Chatelier's principle)
Daltons law
end point
38. When the electron moves from the ground state to an excited state - it ______ energy.
single replacement/displacement
state (thermodynamics)
high
absorbs (in atomic spectra)
39. A chemical reaction where there is an actual exchange of partners to form new compounds. ex: AgNO3 + NaCl -> AgCl + NaNO3.
equivalent point
left (Le Chatelier's principle)
Boyles law
double replacement/displacement
40. 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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41. *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.
single replacement/displacement
electromotive force (emf)/ cell
equation of state
...
42. Rays made up of electrons in basic electron charges.
cathode rays
10 degrees
end point
electrolytic cells
43. A law stating that at a constant temperature - the volume of a gas in inversely proportiona to the pressure.
system (thermodynamics)
colligative property law
Boyles law
state functions (thermodynamics)
44. 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.
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45. **Proceeding across a period from left to right - the ionization energy _______.
first law of thermodynamics
isopiestic process (thermodynamics)
kinetic molecular theory
increases
46. The freezing point is always lowered by addition of solute.
first law of thermodynamics
freezing point depression
pi bonds
Daltons law
47. A solution in which solid solute is in equilibrium with dissolved solute.
saturated solution
Valence Shell Electron Pair Repulsion (VSEPR)
metallic
system (thermodynamics)
48. A process that occurs whent eh system is maintained at constant pressure.
second law of thermodynamics
isopiestic process (thermodynamics)
electrolytic reactions
negative
49. Electronegativities ________ from left to right in a period.
decreases
Le Chatelier's principle
increases
positive
50. Reactions that do not occur spontaneously can be forced to take place by supplying energy with an external current.
anode rays
electrolytic reactions
saturated solution
decreases