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






2. 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


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






4. A solution in which water is the solvent






5. 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






6. 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






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






8. 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.






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






10. Numbers that specify the properties of atomic orbitals and of their electrons






11. 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






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






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






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






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






16. The ways in which electrons are arranged in various orbitals around the nuclei of atoms






17. The energy required to remove an electron from a gaseous atom; generally increases in moving from left - to - right across a period and decreases in moving down a group






18. 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.






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






20. 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






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






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






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






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






25. No two electrons or protons or neutrons in a given system can be in states characterized by the same set of quantum numbers






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






27. Redox reaction - in which the same species is both oxidized and reduced.






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






29. 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


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






31. An ionic compound that resists changes in its pH






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






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






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






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






36. Spectrum of certain absorbed wavelengths of light corresponding to an atom's spectrum of emitted frequencies of light. Unique to each element. AAS can be used to indentify an element.






37. The molar solubility of one salt is reduced when another salt - having a common ion is brought into the same solution






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






39. 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.






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






41. The quantum number that indicates the main energy level occupied by the electron. Can theoretically take on any positive interger. Denoted by the letter n.






42. 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.






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






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






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






46. 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


47. 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






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






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






50. E=hc/?