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






2. Electronegativities _______ as you go down a group.






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






4. Metals have electronegativities less than ____






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






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






7. *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.






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






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






10. 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






11. *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






12. 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


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






14. 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


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






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






17. 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.






18. *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.






19. The vapor pressure increases with increasing _____.






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






21. 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.






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






23. When solids are heated at certain perssures - some solids vaporize directly without passing through the liquid phase.






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






25. 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






26. Rays made up of electrons in basic electron charges.






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






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






29. 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


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






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






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






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






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






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






36. 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.






37. 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


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






39. 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


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






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






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






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






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






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






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






47. 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.






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






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






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