Test your basic knowledge |

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. Metals have electronegativities less than ____






2. The pressure of a gas is the result of collisions between the gas molecules and the walls of the container.






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






4. *Molecules of ideal gases have no attraction for one another and have no intrinsic volume - they are ______ _____






5. 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.






6. The degree of randomness of a system is represented by a thermodynamic quantity called? the greater the randomness - the greater the _______.






7. 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.






8. The enthalpy changes associated with the reactions that correspond to the formation of a substance from its free elements are called?






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






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






11. A chemical reaction where there is an actual exchange of partners to form new compounds. ex: AgNO3 + NaCl -> AgCl + NaNO3.






12. Gases are composed of tiny - invisible molecules that are widely separated from one another in otherwise empty space.






13. 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.

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183


14. 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


15. *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.






16. The amount of heat energy required to raise the temperature 1g of a substance by 1 degree celcius.






17. _______ has very little effect on the solubility of liquids or solids in liquid solvents.






18. If an inert gas is introduced into a reaction vessel containing other gases at equilibrium - it will cause an increase in the ______ _____ within the container - but the increase will not affect the position of equilibrium.

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183


19. Reactions that do not occur spontaneously can be forced to take place by supplying energy with an external current.






20. 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.






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






22. 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.






23. A chemical reaction formed from the breakdown of a compound into its individual elements or compounds.






24. The heat required to change 1mole of solid completely to vapor.






25. 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).






26. 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


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






28. 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.






29. *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






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






31. The law stating that in any spontaneous process there is an increase in the entropy of the universe.






32. The amount of heat energy required to raise the temperature of a given quantity of a substance one degree celcius.






33. **As we proceed to the right of the table - ______-forming properties decrease and _____-forming properties increase.






34. 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.

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183


35. When an electron moves from an excited state to the ground state - it _______ energy.






36. The vapor pressure of an aqueous solution is always lowered by the additon of more solute - which causes the boiling point to be raised.






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






38. The heat change during a process carried out at a constant pressure.






39. For a cell at concentrations and conditions other than standard - a potential can be calculated using this equation.






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






41. 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 _____ _






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






43. 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.






44. Decreasing the concentrations of reactants shifts the equilibrium to the ______ - thus decreasing the concentration of products formed.

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183


45. A process that occurs whent eh system is maintained at constant pressure.






46. _____ bonds are present in molecules containing double or triple bonds.






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






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






49. Heat added to a system and work done by a system are considered _________ quantities.






50. *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.