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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. 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.

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






3. *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.






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






5. A catalyst lowers the ______ _____ _____ that must be overcome in order for the reaction to proceed. It merely speeds the approach to equilibrium but does not change Keq at all.

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






7. 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.






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






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






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






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






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






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






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






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






16. 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).






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






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






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






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






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






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






23. 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.

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






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






26. *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.






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






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






29. 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.






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






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






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






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






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

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






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






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






38. 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.

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






40. The ________ of an element is a number that measerures the relative strength in which the atoms of the element attract valence electrons in a chemical bond - on a scale of 0-4.






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






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 ______ 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).






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






45. 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.






46. 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






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






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






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






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