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. Halogens; ns2np5 - - 2nd most reactive group - The Halogens; very active because of need to fill; form -1 ions; 7 electrons in valence shell; tend to form salts with elements from groups 1A and 2A






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






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






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






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






6. Named after their cation and anion






7. Small discrete increments of energy.






8. 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


9. 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






10. Two or more atoms held together by covalent bonds






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






12. Have the shape of a sphere - with the center of the sphere at the nucleus; completely symmetrical along all axes; 1s orbital is spherically symmetric and has no nodes; 2s orbital is also spherical but contains a node and is higher in energy






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






14. 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


15. 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.






16. 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-






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






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






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






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






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






22. The process by which a gas escapes from one container to another at lower pressure through a tiny hole in the container.






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






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






25. E=hc/?






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






27. States that if a stress is applied to a system at equilibrium - the system shifts in the direction that relieves the stress.






28. The hypothetical equation showing only the species that is oxidized or reduced in a redox reaction and the correct number of electrons transferred between the species in the complete - balanced equation.






29. 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






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






31. An ionic compound that resists changes in its pH






32. Charge assigned to an atom in a molecule or polyatmic ion - calculated by (# valence electrons) - (# 1/2 bonding electrons) - (# nonbonding electrons). Molecules containing atoms with lower formal charges tend to be more stable than those with higher






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






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






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






36. 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.






37. 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






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






39. 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.






40. A horizontal row of elements in the periodic table






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






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






43. 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






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






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






46. 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.






47. Simplest whole # ration of atoms in a compound






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






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






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






Can you answer 50 questions in 15 minutes?



Let me suggest you:

Browse all subjects

Browse all tests

Most popular tests



Major Subjects

Tests & Exams


AP
CLEP
DSST
GRE
SAT
GMAT

Browse all subjects

Browse all tests

Most popular tests