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CLEP Chemistry 1

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. 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.


2. This process occurs when the system is maintained at the same temperature throughout an experiment.






3. 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.


4. The molecules in a gas are in constant - continueous - random - and straight-line motion.






5. For most substances - when a hot concentrated solution is cooled - the excess solid ________. This is useful in purification of the solute.






6. This law states that the entropy of any pure - perfect crystal at absolute zero is equal to zero.






7. The action of salts of weak acids or bases with water to form acidic or basic solutions.






8. Electronegativities _______ as you go down a group.






9. Liquids with strong attractive forces have ______ boiling points.






10. **Proceeding across a period from left to right - the ionization energy _______.






11. The relatively weak attractive forces between molecules that are apparent only when the molecules approach one another closely (usually at low temperatures and high pressure).






12. A chemical reaction formed from the union of its elements.






13. For a ________ reaction - the energy liberated in the exothermic reaction equals the energy absorbed in the endothermic reaction.






14. A solution in which solid solute is in equilibrium with dissolved solute.






15. *The Concentration usually _____ the chemical reaction rate with increasing concentrations of the reactants.






16. Another way the second law is stated is that in any spontaneous change - the amount of free energy available ______.






17. Deviations from Boyles law that occur with real gases represent _______ behavior.






18. The vapor pressure increases with increasing _____.






19. *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.






20. 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.


21. In a closed system - when opposing changes are taking place at equal rates - the system is said to be in _____ _______.






22. Cells that convert electrical energy into chemical energy.






23. 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.






24. *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






25. The particular portion of the universe on which we wish to focus our attention. Everything else is called the surroundings.






26. The temperature at which a substance's solid and liquid phases are in equilibrium.






27. When the electron moves from the ground state to an excited state - it ______ energy.






28. When the rate of evaporation equals the rate of condensation - the system is in __________.






29. In titration - this is the point at which a particular indicator changes color.






30. A pure crystal of elemental metal consists of roughly Avogrado's number of atoms held together by ________ bonds.






31. The most active metals are found in what corner of the periodic table?






32. 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.






33. A law that states that under conditions of constant temperature and pressure - equal volumes of different gases contain equal numbers of molecules.






34. Rays made up of positive electrodes in basic electron charges.






35. The solubility of gases in liquid or solid solvents always increases with ________ pressure.






36. A chemical reaction where one substance is displacing another. ex: Fe + CuSo4 -> FeSo4 + Cu.






37. The temperature at which the pressure of vapor escaping from the liquid equals atmospheric pressure.






38. 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.


39. The pressure exerted by the gas molecules when they are in equilibrium with the liquid.






40. *The temperature affects chemical reactions with an increase of ___degrees C above room temperature - causing the reaction rate to double.






41. 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.






42. Metals have electronegativities less than ____






43. A law stating that at constant pressure - the volume of a given quantity of a gas varies directly with the temperature.






44. The normal boiling point of a liquid is the temperature at which its vapor pressure is 760mm Hg.






45. The process of mixing different orbitals of the same atom to form a new set of equivalent orbitals.






46. A law stating that at a constant temperature - the volume of a gas in inversely proportiona to the pressure.






47. *The surface area exposed affect chemical reactions because most reactions depend on the reactants coming into contact - increasing the rate of the reaction.






48. A state function in which it is the heat content of a substance.






49. In an exothermic process - energy is released and ^E of reaction is ________.






50. 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