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 exerted by each gas in a mixture is called its _____ pressure.






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






4. 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.






5. *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






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






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






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






9. 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.






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






11. This process occurs when the system is thermally isolated so that no heat enters or leaves.






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






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






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






15. When a hydrogen atom is bonded to a highly electronegative atom - it will become partially _____-charged - and will be attracted to neighboring electron pairs. This creates a hydrogen bond. The more polar the molecule - the more effective the hydroge






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






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






18. 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 _____ _






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






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






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






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






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






24. Cells that convert electrical energy into chemical energy.






25. The freezing point is always lowered by addition of solute.






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






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






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






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






30. 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






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






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






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






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






35. 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.






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






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






38. 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.


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






40. 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.






41. 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.






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






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






44. 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.


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






46. *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.






47. The change in enthalpy of an endothermic reaction is ________.






48. *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.






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






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