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






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






3. 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.






4. 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






5. 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.






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






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






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






9. 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


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






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






12. Heat added to a system and work done by a system are considered _________ quantities.






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






14. Increase in the concentrations of reactants shifts the equilibrium to the ______ - thus increasing the amount of products formed.

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


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






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






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






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






20. Cells that convert electrical energy into chemical energy.






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






22. 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


23. Metals have electronegativities less than ____






24. 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.






25. The molecules in a gas collide with one another - but the collisions are perfectly elastic (they result in no net loss of energy).






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






27. 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


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






29. 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.






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






31. *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






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






33. The process of determining the amount of a solution of known concentration that is required to react completely with a certain amount of a sample that is being analyzed.






34. *The Concentration usually _____ the chemical reaction rate with increasing concentrations of the reactants.






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






36. 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.






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






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






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






40. 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


41. *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.






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






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

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


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






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






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






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






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






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