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






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






3. The vapor pressure increases with increasing _____.






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






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






6. 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).






7. 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).






8. 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.






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






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






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






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






13. 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.






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






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






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






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






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






19. **Five factors that affect reaction rates: 1. The nature of the reactants and products. 2. The surface area exposed. 3. The concentrations. 4. The temperature. 5. The catalyst.






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






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






22. *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.






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






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






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






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






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






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






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






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






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






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






33. 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


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






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






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






37. *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.






38. 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


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






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






41. 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.






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






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






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






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






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






47. 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


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






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






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