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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 weight in grams of compound that can be substituted by 1 atom of Hydrogen. GEW = MW / # of acidic Hyrdogens






2. The reaction of the ions that characterize acids and the ions that characterize bases to form water molecules and a salt






3. The ways in which electrons are arranged in various orbitals around the nuclei of atoms






4. Charge assigned to an atom in a molecule or polyatmic ion - calculated by (# valence electrons) - (# 1/2 bonding electrons) - (# nonbonding electrons). Molecules containing atoms with lower formal charges tend to be more stable than those with higher






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






6. PH of a molecule at which it contains no net electric charge - isoelectric point.






7. 5 different orbitals shaped like clover leaves and max electrons is 10






8. A reaction in which two or more substances combine to form a single substance A+B>>>>>>>C






9. When a solute is dissolved in a solvent - it will dissociate until reaching an equilibrium point at which the rate of dissociation equals the rate of precipitation of the solute - regardless of any additional solute introduced into the mixture






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






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






12. 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






13. A reaction where a compound does Not change its molecular structure.






14. An atom - ion - or molecule that donates an electron pair to form a covalent bond.






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






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






17. 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.






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






19. 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






20. The average distance between the nuclei of two bonded atoms






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






22. 5 valence electrons -3 ions - Nitride N






23. E=hc/?






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






25. 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






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






27. Attractive and repulsive forces between molecules that are weaker than forces within molecules.






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






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






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






31. Standard Temperature and Pressure. 273 Kelvin (0 Celsius) - 1 atmosphere (760 torr - 760 kPA).






32. Process by which molecules tend to move from an area where they are more concentrated to an area where they are less concentrated






33. Large molecular structures - strong covalent bonding - share qualities of IONIC And COVALENT






34. 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






35. Have three valance electrons. In certain instances - some elements will loose three electrons - but they will also share electrons with another element to attain stability.






36. States that it is impossible to determine simultaneously both the position and momentum of an electron or any other particle






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






38. Systematic pairing of a deprotonated species (base) with its protonated form (conjugate acid). Conjugates appear on opposite sides of a chemical equation.






39. A substance that - when dissolved in water - results in a solution that can conduct electricity






40. 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.






41. An atom or group of atoms that has a positive or negative charge






42. (chemistry) a substance that changes color to indicate the presence of some ion or substance






43. Two or more atoms held together by covalent bonds






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






45. When dipoles are dissolved in a solution where ions are present ions wil arrange themselves with the opposite charged end of the dipole.






46. 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






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






48. (chemistry) a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight






49. States that if a stress is applied to a system at equilibrium - the system shifts in the direction that relieves the stress.






50. PH=pka+log[base/acid] Used in titration based problems that relates the pH or pOH of a solution to the pK and the ratio of the dissociated species.