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






2. An equilibrium expression used to measure weak - acid strength - given by the ratio of the product of the products' molar concentrations to the product of the reactants' molar concentrations - with each term raised to the power of its stoichiometric






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






4. A graph of pressure versus temperature that shows the conditions under which the phases of a substance exist






5. The sum of the exponents in a rate law - where each exponent provides the reaction order with respect to its reactants






6. Defined acids as subtsances that produced H ions in water - while bases produced OH ions. When they reacted together - H and OH neutralise to make water






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






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

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






10. 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






11. Slightly less reactive than alkali metals - comprise group II






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






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






14. Expression of auto - ionization of water into H+ and OH- at a certain temperature - given by the product of the ions' molar concentrations. Denoted by Kw and equal to 10-






15. The amount of product that can be made in a chemical reaction based on the amount of limiting reactant






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






17. 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.






18. 5 different orbitals shaped like clover leaves and max electrons is 10






19. Property of the elements that can be predicted from the arrangement of the periodic table






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






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






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






23. A chemical bond that involves sharing a pair of electrons between atoms in a molecule






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






25. 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






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






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






28. 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






29. 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






30. 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






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






32. 4 valence electrons +4 - -4 ions. - Carbon Group can form covalent bonds with nonmetals. Only carbon forms strong pi bonds






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






34. Atoms react by gaining or losing electrons so as to acquire the stable electron structure of a noble gas - usually eight valence electrons






35. A solid made up of particles that are not arranged in a regular pattern.






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






38. A fundamental constant - h - that relates the energy of light quanta to their frequency: h = 6.6 X 10^-34 joule

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39. 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.






40. Energy released when an atom or ion in the gaseous state gains an electron. Increases from left to right and from bottom to top on the Periodic Table.






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






42. 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.






43. A physical property of a solution that depends on the number - but not the identity - of the disswolved solute particles; example properties include vapor pressure lowering - boiling point elevation - osmotic pressure - and frezzing point depression






44. 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.






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






46. Solids in which the particles are arranged in a repeating - 3- D pattern - has a specific melting point - classified as ionic network covalent - metallic or molecular.






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






48. Simplest whole # ration of atoms in a compound






49. 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






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







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