Test your basic knowledge |

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 solubility of one salt is reduced when another salt - having a common ion is brought into the same solution






2. An element in an 'A' group in the periodic table; as a group these elements display a wide range of physical and chemical properties. In their atoms - the s and p sublevels in the highest occupied energy level are partially filled






3. Sol - a chemical process in which solvent molecules and molecules or ions of the solute combine to form a compound






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






5. 2.18 x 10^-18 J/electron






6. Have the shape of a sphere - with the center of the sphere at the nucleus; completely symmetrical along all axes; 1s orbital is spherically symmetric and has no nodes; 2s orbital is also spherical but contains a node and is higher in energy






7. A reaction in which atoms of one element take the place of atoms of another element in a compound






8. A subatomic particle that has a positive charge and that is found in the nucleus of an atom Charge of +1 and mass of 1.0073 amu






9. 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.






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






11. One - half the distance between the nuclei of two atoms of the same element when the atoms are joined






12. A measured amount of a solution of unknown concentration is added to a known volume of a second solution until the reaction between them is just complete






13. A definite stable energy that a physical system can have






14. A dynamic condition in which two opposing changes occur at equal rates in a closed system






15. When polar molecules orient themselves such that the positive region of one molecule is close to the negative region of another molecule.






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






17. The hypothetical equation showing only the species that is oxidized or reduced in a redox reaction and the correct number of electrons transferred between the species in the complete - balanced equation.






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






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






20. The molar amount of a solute that can dissolve in 1L of solvent until equilibrium - saturation - is reached






21. In a solution - the substance that dissolves in the solvent






22. The ratio of the number of moles of solute dissolved in one kilogram of solvent. molality (M = moles solute/kg of solution)






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


24. Set of spectral lines appearing in the UV region when a hydrogen atom undergoes a transition from energy levels n>1 to n=1.






25. No two electrons or protons or neutrons in a given system can be in states characterized by the same set of quantum numbers






26. 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.






27. 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






28. A set of spectral lines that appear in the visible light region when a hydrogen atom undergoes a transition from energy levels n>2 to n=2.






29. Play- by- play showing the individual steps of a reaction - including the formation and destruction of any reaction intermediates that may occur.






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






31. The nuclear charge experienced by the outermost electrons of an atom (actual charge minus the shielding caused by inner shells: Z- eff)






32. The tendency for an atom to attract electrons to itself when it is chemically combined with another element






33. A pair of equal and opposite electric charges or magnetic poles separated by a small distance






34. Simplest whole # ration of atoms in a compound






35. A base that can accept two moles of H+ per mole of itself (ex: SO4






36. Alkaline Earth Metals - 2 valence electrons +2 ions - Magnesium Mg






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






38. The center of the atom which contains the protons and neutrons; in cells - structure that contains the cell's genetic material (DNA) and controls the cell's activities






39. The quantum number that has only two possible values - +1/2 and -1/2 - which indicate the two fundamental spin states of an electron in an orbital






40. 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.






41. Contains nonmetals that are non - reactive. Full outermost energy level except helium which has 2.






42. Elements in the middle of the periodic table - in groups 3-12.






43. 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






44. The process by which a gas escapes from one container to another at lower pressure through a tiny hole in the container.






45. Mixture of 2 or more substances that distills at a constant temperature and with constant composition - even though seperately the components have different boiling points






46. A subdivision of an energy level in an atom. They are divided into orbitals.






47. 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.






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






49. The number of atoms in exactly 12 g of pure 12c and equal to 6.022 x 10^23 is called






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