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






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






3. 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.






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






5. 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


6. 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


7. Metals have electronegativities less than ____






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






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






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






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






12. 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.






13. Any spontaneous change in a chemical reaction will decrease the amount of free energy toward _______ as the process proceeds towards equilibrium.






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






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






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






17. 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.






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






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






20. 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


21. 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.






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






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






24. 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).






25. The change in enthalpy of an exothermic reaction is ________.






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






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






28. *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.






29. This law states that the total pressure exerted by a mixture of gases is equal to the sum of the partial pressures of the gases in mixture.






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






31. A hypothetical gas would follow Boyles law under all conditions and is called?






32. 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


33. 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.






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






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






36. The force with which the electrons flow from the negative electrode to the positive electrode through an external wire is called?






37. In a closed system - when the rates of evaporation and condensation are equal - the system is in ____ ______.






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






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






40. A catalyst affects a chemical reaction by lowering the _____ _____ for both the forward and the reverse reactions equally.






41. 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.






42. The energy required to remove an electron from an isolated atom in its ground state.






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






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






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






46. A law that states that for a given mass of gas - the volume is proportional to the pressure and absolute temperature.






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






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






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






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