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






2. Increasing the pressure on a system at equilibrium will cause a shift in the position of equilibrium in the direction of the fewest number of ______ of gaseous reactants or products.

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


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






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






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






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






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






8. 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.






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






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






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






12. In an endothermic process - energy is absorbed and ^E is _______.






13. *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.






14. 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.






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






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






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






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






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






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






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






22. 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


23. *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.






24. Cells that convert electrical energy into chemical energy.






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






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






28. 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.






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






30. 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.






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






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






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






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






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






37. The relatively weak attractive forces between molecules that are apparent only when the molecules approach one another closely (usually at low temperatures and high pressure).






38. 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


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






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






41. Metals have electronegativities less than ____






42. 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.






43. 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.






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






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






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






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






48. 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.






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






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