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. 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).






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






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






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






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






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






7. 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 _______.

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183


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






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






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






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






12. A chemical reaction formed from the breakdown of a compound into its individual elements or compounds.






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






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






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






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






17. Cells that convert electrical energy into chemical energy.






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






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






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






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






22. **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.






23. 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.






24. 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






25. 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.






26. Metals have electronegativities less than ____






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






28. *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.






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






30. 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.

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183


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






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






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






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






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






36. 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


37. 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.






38. Real gases act in a less than ideal way - especially under conditions of increased pressure and/or decreased temperture. Real gas behavior approaches that of ideal gases as the gas pressure becomes very low. The ideal gas is thus considered a _____ _






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






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






41. *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






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






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. 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






45. *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.






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






47. 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.






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






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






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







Sorry!:) No result found.

Can you answer 50 questions in 15 minutes?


Let me suggest you:

Browse all subjects

Browse all tests

Most popular tests



Major Subjects

Tests & Exams


AP
CLEP
DSST
GRE
SAT
GMAT

Browse all subjects

Browse all tests

Most popular tests