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






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






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






5. Side - to side parallel orbitals overlap to share electrons - the 2nd/3rd covalent bond between two atoms - cannot rotate and maintain the bond.






6. The pressure exerted by a vapor in equilibrium with its liquid or solid phase






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






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






9. 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.






10. A solution in which water is the solvent






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






12. Mixture of 2 or more substances that distills at a constant temperature and with constant composition - even though seperately the components have different boiling points






13. 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






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






15. 5 valence electrons -3 ions - Nitride N






16. One - half the distance between the nuclei of two atoms of the same element when the atoms are joined






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






18. Orbitals of equal energy are each occupied by one electron before any orbital is occupied by a second electron - and all electrons in singly occupied orbitals must have the same spin

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


19. (chemistry) the sum of the relative atomic masses of the constituent atoms of a molecule






20. The point on a phase diagram that represents the only set of conditions at which all three phases exist in equilibrium with one another






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






22. The process of decomposing a chemical compound by the passage of an electric current.






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






24. At a constant pressure - the volume of an ideal gas is directly proportinal to its temperature: V (a) T

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


25. 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






26. The solubility of a gas in a liquid is directly proportional to the partial pressure of that gas on the surface of the liquid

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


27. 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






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






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






30. 1913 - Niels Bohr - said that electrons formed specific layers instead or random ones - said atoms atoms absorb and give off energy when the electrons move from one shell to another






31. 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.






32. 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






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






34. The lowest allowable energy state of an atom






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






36. 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.






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






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






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






40. Rare earth element group (elements 58-71)






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






42. 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






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






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






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






46. 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.






47. A horizontal row of elements in the periodic table






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






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






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