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






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






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






4. A horizontal row of elements in the periodic table






5. 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






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






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






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






9. 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.






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






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






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






13. One - half of the distance between the center of identical atoms that are not bonded together. Since effective nuclear charge increases when moving from left to right each additional electron is pulled more strogly toward the nucleus.






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






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






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






17. Small discrete increments of energy.






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






19. Temperature is constant; effusion and temperature are proportional to the square root of their masses

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


20. (physics) the smallest discrete quantity of some physical property that a system can possess (according to quantum theory) E=hf






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






22. Simplest whole # ration of atoms in a compound






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






24. 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.






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






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






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






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






29. Process by which molecules tend to move from an area where they are more concentrated to an area where they are less concentrated






30. 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






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






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






33. An ionic compound that resists changes in its pH






34. 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.






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






36. 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






37. 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


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






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






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






41. 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






42. 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-






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






44. 2.18 x 10^-18 J/electron






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






46. 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


47. 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






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






49. 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


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