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






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






3. The weight in grams of one mole of a given elementand is expressedin tems of grams per mole.






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






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






6. Two or more atoms held together by covalent bonds






7. 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






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






9. A horizontal row of elements in the periodic table






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






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






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






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






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






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






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. 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.






18. The lowest allowable energy state of an atom






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






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






21. 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






22. 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.






23. Named after their cation and anion






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






25. Acids defined as electron - pair acceptors and bases as electron - pair donors.






26. Simplest whole # ration of atoms in a compound






27. (chemistry) a series from actinium to lawrencium of 15 radioactive elements with increasing atomic numbers






28. The process by which one or more substances change to produce one or more different substances






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






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






31. Where half of the acid is neutralized by the base on a titration curveAn acid dissociation constant - Ka - (also known as acidity constant - or acid - ionization constant) is a quantitative measure of the strength of an acid in solution. It is the eq






32. The area of chemistry that is concerned with reaction rates and reaction mechanisms






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






34. 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






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






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






37. The slowest elementary step which is the limit for the rate of the other steps






38. An emperimentally determined mathmatical expression showing the rate of a reaction as a function of the concentration of its reactants






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






40. Halogens; ns2np5 - - 2nd most reactive group - The Halogens; very active because of need to fill; form -1 ions; 7 electrons in valence shell; tend to form salts with elements from groups 1A and 2A






41. 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






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






43. The energy required to remove an electron from a gaseous atom; generally increases in moving from left - to - right across a period and decreases in moving down a group






44. 2.18 x 10^-18 J/electron






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






46. A covalent bond in which the bonding electrons are shared equally by the bonded atoms - resulting in a balanced distribution of electrical charge






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






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






49. 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.






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