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






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






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






4. 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.






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






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






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






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






9. 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).






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






11. *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.






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






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






14. The vapor pressure increases with increasing _____.






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






16. 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.






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






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






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






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






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






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

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






25. **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.






26. 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.






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






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






29. 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.






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






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






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






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






34. 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.






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






36. 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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37. 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.






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






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






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






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






42. 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.






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






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






45. 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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46. *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.






47. Cells that convert electrical energy into chemical energy.






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






49. Electronegativities _______ as you go down a group.






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






Can you answer 50 questions in 15 minutes?



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