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. *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.






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






3. 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.






4. When a hydrogen atom is bonded to a highly electronegative atom - it will become partially _____-charged - and will be attracted to neighboring electron pairs. This creates a hydrogen bond. The more polar the molecule - the more effective the hydroge






5. 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).






6. 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


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






8. 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).






9. The vapor pressure increases with increasing _____.






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






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






12. When the rate of evaporation equals the rate of condensation - the system is in __________.






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






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






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






16. 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.






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






18. 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.






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






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






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






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






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






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






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






26. 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


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






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






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






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






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






32. 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.






33. 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






34. *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.






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






36. 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






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






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






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






40. 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.






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






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






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






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






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






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






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






48. 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


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






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