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






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






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






4. 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


5. 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.






6. Electronegativities ________ from left to right in a period.






7. Metals have electronegativities less than ____






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






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






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






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






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






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






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






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






16. *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.






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






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






19. 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






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






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






22. 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.






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






24. 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






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






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






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






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






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






30. 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.






31. Because of the low intermolecular forces - the melting points are low and evaporation takes place so easily that it may occur at room temperature.






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






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






34. The most active nonmetals are found in what corner of the periodic table?






35. 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.






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






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






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






39. 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).






40. 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.






41. 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


42. The law stating that change in internal energy is equal to the difference between the energy supplied toi the system as heat and the energy removed from the system as work performed on the surroundings.






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






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






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






46. 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.






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






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






49. An increase in temperature causes the position of equilibrium of an exothermic reaction to be shifted to the _____ - while that of and endothermic reactions is shifted to the _______.

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


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