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MCAT Chemistry

Subjects : mcat, science
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 molar amount of a solute that can dissolve in 1L of solvent until equilibrium - saturation - is reached






2. Attractions between molecules caused by the electron motion on one molecule affecting the electron motion on the other through electrical forces; these are the weakest interactions between molecules






3. 5 different orbitals shaped like clover leaves and max electrons is 10






4. A solution in which water is the solvent






5. The quantum number that indicates the main energy level occupied by the electron. Can theoretically take on any positive interger. Denoted by the letter n.






6. The lowest allowable energy state of an atom






7. (chemistry) separation of a substance into two or more substances that may differ from each other and from the original substance






8. A set of frequencies of electromagnetic waves given off by atoms of an element; consists of a series of fine lines of individual colors






9. A representation of a displacement reaction showing only the reactive species and omitting the spectator ions.






10. Alkali metals: highly reactive - therefore always compounds. - 1 valence electron +1 ion - Hydrogen H? - Lithium Li? - Sodium Na? - Potassium K? - Rubidium Rb? - Cesium Cs?






11. Gram equivalent weight of solute per liter of solution - often denoted by N.






12. (chemistry) any theory in which all matter is composed of tiny discrete finite indivisible indestructible particles






13. Tells you how much solute is present compared to the amount of solvent






14. A structural formula in which electrons are represented by dots; dot pairs or dashes between two atomic symbols represent pairs in covalent bonds.






15. A model of acids and bases which an acid is hydrogen ion donor and base is a hydrogen ion acceptor.






16. Temperature is constant; effusion and temperature are proportional to the square root of their masses

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17. A chemical reaction involving the transfer of one or more electrons from one reactant to another; also called oxidation - reduction reaction.






18. The vapor pressure of solution is the product of the mole fraction of the solvent and the vapor pressure of the pure solvent. P_a=X_aP_total

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19. Region in a molecule where atomic orbitals overlap - resulting in either a stable low - energy bonding orbital or an unstable high - energy antibonding orbital.






20. The point during a titration when the number of H+ ions and OH- ions are equal. This is at the middle of the steepest part of the titration curve.






21. A horizontal row of elements in the periodic table






22. (physics) the smallest discrete quantity of some physical property that a system can possess (according to quantum theory) E=hf






23. The maximum amount of product that can be produced from a given amount of reactant






24. Structure that occurs when it is possible to draw two or more valid electron dot structures that have the same number of electron pairs for a molecule or ion






25. An elementary particle with 0 charge and mass about equal to a proton






26. Keq describes the ratio of product concentration to reactant concentration - with each raised to the power corresponding ot its coefficient ion in the balanced equation






27. The intermolecular force in which a hydrogen atom that is bonded to a highly electronegative atom is attracted to an unshared pair of electrons of an electronegative atom in a nearby molecule






28. (chemistry) p(otential of) H(ydrogen)






29. A concentration unit of a solution expressed as moles of solute dissolved per liter of solution






30. Having characteristics of both an acid and a base and capable of reacting as either






31. Rare earth element group (elements 58-71)






32. Contains nonmetals - 7 valence electrons in it's outermost energy level. Very reactive






33. A chemical reaction involving the transfer of one or more electrons from one reactant to another; also called oxidation - reduction reaction.






34. The formation of one or more covalent bonds between an electron pair donor and an electron pair acceptor






35. Product of the molar concentrations of dissociated ions in solution at any point in the reaction other than equilibrium or saturation - where each ion is raised to the power of its stoichiometric coefficient. Denoted IP.






36. The percent by mass of each element in a compound






37. The pressure exerted by a vapor in equilibrium with its liquid or solid phase






38. Specifies the specific orbital in which the electron is most likely to be found. - Third quantum number - designated as ml. Describes a particular orbital within a subshell where an electron is very likely to be found. Possible values are integers in






39. The amount of energy that reactants must absorb before a chemical reaction will start; also called free energy of activation.






40. Substance in which a solute is dissolved to form a solution






41. E=hc/?






42. Numbers that specify the properties of atomic orbitals and of their electrons






43. Valence Shell Electron Pair Repulsion theory - stating that the three - dimensional molecular geometry about some central atom is determined by the elctronic repulsion between its bonding and nonbonding electron pairs.






44. At a constant pressure - the volume of an ideal gas is directly proportinal to its temperature: V (a) T

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45. The amount of a substance that contains as many particles as there are atoms in exactly 12g of carbon -12






46. Second quantum number - designated by the letter 'l.' This 'angular momentum' refers to the subshells within each principle quantum energy level. It can take on the value of an integer in the 0 to (n -1) range. The four subshellscorresponding to l=0






47. The ratio of the actual yield to the theoretical yield for a chemical reaction expressed as a percentage; a measure of the efficiency of a reaction






48. Product of the molar concentrations of dissociated ions in solution at saturation - where each ion is raised to the power of its stoichiometric coefficient. Denoted Ksp.






49. Resulting positive nuclear charge an outer electron senses after accounting for the shielding effect of inner core electrons. Abbreviated as Z(eff). Increases from left to right - and bottom to top on the Periodic Table.






50. Sum of all the masses - in AMU - present in one molecule of a molecular compound.