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






2. 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.






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






4. Named after their cation and anion






5. Gram equivalent weight of solute per liter of solution - often denoted by N.






6. 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






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






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






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






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






11. 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.






12. 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






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






14. Any sample of a given compound will contain the same elements in the identical mass ratio.






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






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






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






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






19. 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


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






21. Second quantum number - designated by the letter 'l.' This 'angular momentum' refers to the subshells within each principle quantum energy level. It can take on the value of an integer in the 0 to (n -1) range. The four subshellscorresponding to l=0






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






23. 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






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






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






26. 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.






27. The ratio of the actual yield to the theoretical yield for a chemical reaction expressed as a percentage; a measure of the efficiency of a reaction






28. 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






29. Nh/2p The angular momentum changes only in discete amounts with respect to the quantum number. Also E=- R_h/n^2






30. 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-






31. 4 valence electrons +4 - -4 ions. - Carbon Group can form covalent bonds with nonmetals. Only carbon forms strong pi bonds






32. 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.






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






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






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






36. Alkali metals: highly reactive - therefore always compounds. - 1 valence electron +1 ion - Hydrogen H? - Lithium Li? - Sodium Na? - Potassium K? - Rubidium Rb? - Cesium Cs?






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






38. E=hc/?






39. Chalcogens - - Oxide O






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. Theory stating that the rate of a reaction is directly proportional to the number of collisions that take place between reactants per second.






42. Two or more atoms held together by covalent bonds






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






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






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






46. 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






47. A solution in which water is the solvent






48. 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

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


49. A naturally occurring or synthetic compound consisting of large molecules made up of a linked series of repeated simple monomers






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