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






2. 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.






3. 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






4. Sum of the protons and neutrons in an element often denoted by the letter A






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






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






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






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






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






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






11. 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.






12. The energy required to break a chemical bond and form neutral isolated atoms






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






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






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






16. 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






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






18. A chemical bond in which one atom loses an electron to form a positive ion and the other atom gains to electron to form a negative ion






19. (chemistry) separation of a substance into two or more substances that may differ from each other and from the original substance C>>>>A+B






20. 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.






21. 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






22. 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.






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






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

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183


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






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






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






28. 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






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






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






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






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






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






34. 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






35. 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






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






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






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






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






40. A bond formed when two atomic orbitals combine to form a molecular orbital that is symmetrical around the axis connecting the two atomic nuclei






41. 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.






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






43. Named after their cation and anion






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






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






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






47. The lowest allowable energy state of an atom






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






49. A horizontal row of elements in the periodic table






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