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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. 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.






2. 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.






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






4. *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






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






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






7. *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.






8. 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.






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






10. 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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11. A law stating that the vapor pressure of a solution at a particular temperature is equal to teh mole fraction of the solvent in the liquid phase multiplied by the vapor pressure of the pure solvent at the same temperature.






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






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






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






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






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






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






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






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






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






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






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






23. 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.

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






25. 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.






26. 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.






27. Cells that convert electrical energy into chemical energy.






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






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






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






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






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






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






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






36. 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.






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






38. When an electron moves from an excited state to the ground 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. A law stating that at constant pressure - the volume of a given quantity of a gas varies directly with the temperature.






41. 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.

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






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






44. The most active metals are found in what corner of the periodic table?






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






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






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






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






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






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