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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 molecules in a gas collide with one another - but the collisions are perfectly elastic (they result in no net loss of energy).
saturated solution
kinetic molecular theory
colligative property law
VSEPR
2. The action of salts of weak acids or bases with water to form acidic or basic solutions.
left - right (Le Chatelier's principle)
freezing point depression
positive
hydrolysis
3. The law stating that in any spontaneous process there is an increase in the entropy of the universe.
second law of thermodynamics
vapor pressure
phase equilibrium
colligative property law
4. A chemical reaction formed from the union of its elements.
colligative property law
combination
Raoults law
phase equilibrium
5. This process occurs when the system is thermally isolated so that no heat enters or leaves.
adiabatic process (thermodynamics)
left - right (Le Chatelier's principle)
increasing
standard atmospheric pressure
6. Decreasing the concentrations of reactants shifts the equilibrium to the ______ - thus decreasing the concentration of products formed.
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7. Because of the low intermolecular forces - the melting points are low and evaporation takes place so easily that it may occur at room temperature.
Van der Waals
electrolytic reactions
upper right corner
VSEPR
8. When the rate of evaporation equals the rate of condensation - the system is in __________.
2
enthalpy
second law of thermodynamics
equilibrium
9. A solution in which solid solute is in equilibrium with dissolved solute.
equilibrium
anode rays
saturated solution
state functions (thermodynamics)
10. *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
molar heat of sublimation
left - right (Le Chatelier's principle)
...
valence
11. _______ has very little effect on the solubility of liquids or solids in liquid solvents.
pressure
single replacement/displacement
combined gas law
right (Le Chatelier's principle)
12. A law stating that at a constant temperature - the volume of a gas in inversely proportiona to the pressure.
increases
anode rays
electromotive force (emf)/ cell
Boyles law
13. 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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14. For a cell at concentrations and conditions other than standard - a potential can be calculated using this equation.
heat capacity
equilibrium
2
Nernst equation
15. 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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16. Heat added to a system and work done by a system are considered _________ quantities.
positive
Van der Waals
Charles law
decreases
17. **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.
...
electronegativity
state functions (thermodynamics)
negative
18. 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.
Nernst equation
crystallizes
activation energy
first law of thermodynamics
19. 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.
Raoults law
enthalpy
electronegativity
Van der Waals
20. The pressure exerted by the gas molecules when they are in equilibrium with the liquid.
anode rays
vapor pressure
increases
activation energy
21. 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.
vapor pressure
combination
titration
Raoult's law
22. A law stating that at constant pressure - the volume of a given quantity of a gas varies directly with the temperature.
kinetic molecular theory
left (Le Chatelier's principle)
valence
Charles law
23. 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.
base - acid
VSEPR
heats of formation
saturated solution
24. A hypothetical gas would follow Boyles law under all conditions and is called?
heats of formation
base - acid
increases
ideal gas
25. The force with which the electrons flow from the negative electrode to the positive electrode through an external wire is called?
equilibrium
titration
Charles law
electromotive force (emf)/ cell
26. *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.
Daltons law
freezing point depression
moles (Le Chatelier's principle)
...
27. 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.
reversible
phase equilibrium
negative
Charles law
28. The amount of heat energy required to raise the temperature 1g of a substance by 1 degree celcius.
activation energy
activation energy barrier (Le Chatelier's principle)
specific heat
equilibrium
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.
double replacement/displacement
Charles law
non-ideal
Raoult's law
30. A law stating that the vapor pressure of a solution at a particular temperature is equal to teh mole fraction of the solvent in the liquid phase multiplied by the vapor pressure of the pure solvent at the same temperature.
Raoults law
hybridyzation
pressure
temperature
31. The particular portion of the universe on which we wish to focus our attention. Everything else is called the surroundings.
equilibrium
decomposition
system (thermodynamics)
pi bonds
32. *The Concentration usually _____ the chemical reaction rate with increasing concentrations of the reactants.
non-ideal
increases
Le Chatelier's principle
Van der Waals
33. Increase in the concentrations of reactants shifts the equilibrium to the ______ - thus increasing the amount of products formed.
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34. This process occurs when the system is maintained at the same temperature throughout an experiment.
first law of thermodynamics
electrolytic cells
isothermal process (thermodynamics)
electrolytic reactions
35. For a ________ reaction - the energy liberated in the exothermic reaction equals the energy absorbed in the endothermic reaction.
Boyles law
reversible reaction
heat capacity
Avogrados law
36. The enthalpy changes associated with the reactions that correspond to the formation of a substance from its free elements are called?
Raoult's law
heats of formation
kinetic molecular theory
vapor pressure
37. Electronegativities ________ from left to right in a period.
combination
kinetic molecular theory
increases
point particles
38. Reactions that do not occur spontaneously can be forced to take place by supplying energy with an external current.
electrolytic reactions
right (Le Chatelier's principle)
first law of thermodynamics
reversible
39. Rays made up of positive electrodes in basic electron charges.
2
high
state (thermodynamics)
anode rays
40. The change in enthalpy of an exothermic reaction is ________.
negative
state functions (thermodynamics)
heat capacity
metallic
41. *Molecules of ideal gases have no attraction for one another and have no intrinsic volume - they are ______ _____
colligative property law
boiling point
state (thermodynamics)
point particles
42. When the electron moves from the ground state to an excited state - it ______ energy.
combination
kinetic molecular theory
absorbs (in atomic spectra)
Van der Waals
43. 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 _______.
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44. 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.
electrolytic reactions
pressure
kinetic molecular theory
positive
45. *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
entropy
reversible
10 degrees
46. *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.
freezing point depression
wave mechanical model
combined gas law
Van der Waals
47. A law that states that under conditions of constant temperature and pressure - equal volumes of different gases contain equal numbers of molecules.
Avogrados law
titration
combined gas law
...
48. Liquids with strong attractive forces have ______ boiling points.
Avogrados law
Valence Shell Electron Pair Repulsion (VSEPR)
decomposition
high
49. Cells that convert electrical energy into chemical energy.
catalysts
entropy
single replacement/displacement
electrolytic cells
50. **As we proceed to the right of the table - ______-forming properties decrease and _____-forming properties increase.
2
base - acid
vapor pressure
pi bonds