SUBJECTS
|
BROWSE
|
CAREER CENTER
|
POPULAR
|
JOIN
|
LOGIN
Business Skills
|
Soft Skills
|
Basic Literacy
|
Certifications
About
|
Help
|
Privacy
|
Terms
|
Email
Search
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. *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.
change in enthalpy
kinetic molecular theory
wave mechanical model
pi bonds
2. The molecules in a gas are in constant - continueous - random - and straight-line motion.
kinetic molecular theory
negative
state (thermodynamics)
emits (in atomic spectra)
3. The force with which the electrons flow from the negative electrode to the positive electrode through an external wire is called?
third law of thermodynamics
electromotive force (emf)/ cell
Avogrados law
high
4. *The surface area exposed affect chemical reactions because most reactions depend on the reactants coming into contact - increasing the rate of the reaction.
...
electrolytic cells
positive
system (thermodynamics)
5. 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.
vapor pressure
catalysts
state functions (thermodynamics)
limiting law
6. In an endothermic process - energy is absorbed and ^E is _______.
positive
isopiestic process (thermodynamics)
anode rays
reversible
7. **Proceeding across a period from left to right - the ionization energy _______.
Valence Shell Electron Pair Repulsion (VSEPR)
equilibrium
limiting law
increases
8. _______ has very little effect on the solubility of liquids or solids in liquid solvents.
dynamic equilibrium
heat capacity
saturated solution
pressure
9. The freezing point is always lowered by addition of solute.
vapor pressure
combined gas law
freezing point depression
kinetic molecular theory
10. *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.
Nernst equation
valence
Valence Shell Electron Pair Repulsion (VSEPR)
...
11. *The temperature affects chemical reactions with an increase of ___degrees C above room temperature - causing the reaction rate to double.
10 degrees
negative
crystallizes
Charles law
12. 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
ionization energy
temperature
Van der Waals
bohr model
13. A valence theory that permits the geometric arrangement of atoms - or groups of atoms - about some central atom to be determined solely by considering the repulsions between the electron pairs present in the valence shell of the central atom.
hybridyzation
total pressure (Le Chatelier's principle)
Valence Shell Electron Pair Repulsion (VSEPR)
increases
14. When the rate of evaporation equals the rate of condensation - the system is in __________.
activation energy barrier (Le Chatelier's principle)
VSEPR
single replacement/displacement
equilibrium
15. The enthalpy changes associated with the reactions that correspond to the formation of a substance from its free elements are called?
heats of formation
high
electrolytic cells
single replacement/displacement
16. The change in enthalpy of an exothermic reaction is ________.
reversible reaction
kinetic molecular theory
electrolytic cells
negative
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.
heat capacity
...
non-ideal
irreversible and reversible processes
18. The amount of heat energy required to raise the temperature of a given quantity of a substance one degree celcius.
colligative property law
activation energy
heat capacity
valence
19. The vapor pressure increases with increasing _____.
temperature
Charles law
point particles
end point
20. 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.
melting point
equivalent point
end point
hybridyzation
21. A pure crystal of elemental metal consists of roughly Avogrado's number of atoms held together by ________ bonds.
Avogrados law
metallic
electromotive force (emf)/ cell
end point
22. Increase in the concentrations of reactants shifts the equilibrium to the ______ - thus increasing the amount of products formed.
Warning
: Invalid argument supplied for foreach() in
/var/www/html/basicversity.com/show_quiz.php
on line
183
23. The change in enthalpy of an endothermic reaction is ________.
titration
reversible reaction
reversible
positive
24. This law states that the entropy of any pure - perfect crystal at absolute zero is equal to zero.
kinetic molecular theory
third law of thermodynamics
single replacement/displacement
high
25. For a cell at concentrations and conditions other than standard - a potential can be calculated using this equation.
emits (in atomic spectra)
melting point
Nernst equation
Charles law
26. 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.
Van der Waals
non-ideal
system (thermodynamics)
titration
27. A chemical reaction where one substance is displacing another. ex: Fe + CuSo4 -> FeSo4 + Cu.
Van der Waals
pressure
increases
single replacement/displacement
28. 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
equilibrium
crystallizes
Le Chatelier's principle
29. The particular portion of the universe on which we wish to focus our attention. Everything else is called the surroundings.
increases
dynamic equilibrium
sublimation
system (thermodynamics)
30. *Molecules of ideal gases have no attraction for one another and have no intrinsic volume - they are ______ _____
2
VSEPR
point particles
activation energy
31. The energy required to remove an electron from an isolated atom in its ground state.
ionization energy
Van der Waals
reversible
positive
32. Any spontaneous change in a chemical reaction will decrease the amount of free energy toward _______ as the process proceeds towards equilibrium.
reversible
positive
zero
point particles
33. 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.
dynamic equilibrium
state functions (thermodynamics)
Le Chatelier's principle
specific heat
34. The pressure of a gas is the result of collisions between the gas molecules and the walls of the container.
kinetic molecular theory
Le Chatelier's principle
change in enthalpy
activation energy barrier (Le Chatelier's principle)
35. 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.
Warning
: Invalid argument supplied for foreach() in
/var/www/html/basicversity.com/show_quiz.php
on line
183
36. The pressure exerted by each gas in a mixture is called its _____ pressure.
pi bonds
partial
base - acid
vapor pressure
37. 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.
Van der Waals
colligative property law
sublimation
saturated solution
38. The most active nonmetals are found in what corner of the periodic table?
upper right corner
Le Chatelier's principle
positive
isopiestic process (thermodynamics)
39. A catalyst affects a chemical reaction by lowering the _____ _____ for both the forward and the reverse reactions equally.
negative
activation energy
partial
electrolytic cells
40. The pressure exerted by the gas molecules when they are in equilibrium with the liquid.
reversible reaction
vapor pressure
combined gas law
absorbs (in atomic spectra)
41. A law that states that under conditions of constant temperature and pressure - equal volumes of different gases contain equal numbers of molecules.
...
titration
Avogrados law
anode rays
42. When an electron moves from an excited state to the ground state - it _______ energy.
...
zero
titration
emits (in atomic spectra)
43. When solids are heated at certain perssures - some solids vaporize directly without passing through the liquid phase.
standard atmospheric pressure
sublimation
ideal gas
increasing
44. 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.
negative
temperature
Van der Waals
pressure
45. 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.
melting point
first law of thermodynamics
metallic
equation of state
46. 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.
Warning
: Invalid argument supplied for foreach() in
/var/www/html/basicversity.com/show_quiz.php
on line
183
47. _____ bonds are present in molecules containing double or triple bonds.
adiabatic process (thermodynamics)
boiling point
pi bonds
colligative property law
48. Gases are composed of tiny - invisible molecules that are widely separated from one another in otherwise empty space.
kinetic molecular theory
Van der Waals
left (Le Chatelier's principle)
hydrolysis
49. A law that states that for a given mass of gas - the volume is proportional to the pressure and absolute temperature.
increases
combined gas law
Daltons law
Boyles law
50. 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
sublimation
pi bonds
state (thermodynamics)