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. 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






2. An ionic compound that resists changes in its pH






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






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






5. Small discrete increments of energy.






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






7. 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






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






9. An uncharged molecule with a single unpaitred electron in its outer ring - very unstable - exists for only about 10 seconds






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






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






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






13. 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






14. 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.






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






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






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






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






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






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






21. 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.






22. 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.






23. Chalcogens - - Oxide O






24. 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






25. 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


26. A chemical formula showing the ratio of elements in a compound rather than the total number of atoms






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. Product of the molar concentrations of dissociated ions in solution at saturation - where each ion is raised to the power of its stoichiometric coefficient. Denoted Ksp.






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






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






32. 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






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






34. 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






35. 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


36. Having characteristics of both an acid and a base and capable of reacting as either






37. 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






38. Common definition of acids as proton (H+) donors and bases as proton acceptors






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






40. Attractions between molecules caused by the electron motion on one molecule affecting the electron motion on the other through electrical forces; these are the weakest interactions between molecules






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






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






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






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






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






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






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






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






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






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