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. 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






2. A horizontal row of elements in the periodic table






3. Resulting positive nuclear charge an outer electron senses after accounting for the shielding effect of inner core electrons. Abbreviated as Z(eff). Increases from left to right - and bottom to top on the Periodic Table.






4. 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






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






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






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






9. 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






10. 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.






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






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






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






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






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






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






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






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






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






20. 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-






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






22. A concentration unit of a solution expressed as moles of solute dissolved per liter of solution






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






24. 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






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






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

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


27. An acid that will completely dissociate in aqueous solution - like HCl - HI - HClO4 HBr.






28. 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






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






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






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






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






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






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






35. 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.






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






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






38. E=hc/?






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






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






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






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






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






44. The weak attractive forces between molecules resulting from the small - instantaneous dipoles that occur because of the varying positions of the electrons during their motion about nuclei






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






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






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






48. An atom - radical - or molecule that has gained or lost one or more electrons and has a negative or positive charge






49. The Percent by mass of each element in a compound.






50. 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