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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. Electronegativities ________ from left to right in a period.






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






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






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






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






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






7. 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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8. *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.






9. The general shape of any molecule can be predicted from the number of bonding and non-bonding electron pairs in the valence shell of the central atom. nonbonded pairs of electrons (lone pairs) are more repellent than bonded pairs.






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






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






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






13. 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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14. The vapor pressure increases with increasing _____.






15. 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).






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






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






18. 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.






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






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






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






22. 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.






23. The solubility of gases in liquid or solid solvents always increases with ________ pressure.






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






25. 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 _______.

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






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






28. 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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29. 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.






30. 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.






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






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






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






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






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






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






37. 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.






38. 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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39. 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






40. In a _______ expansion of a gas - the opposing pressure is virtually equal to the pressure exerted by the gas. It is ______ because any slight increase in the external pressure will reverse the process and cause compression to occure.






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






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






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






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






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






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






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






48. The enthalpy changes associated with the reactions that correspond to the formation of a substance from its free elements are called?






49. The most active nonmetals are found in what corner of the periodic table?






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