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. An equilibrium expression used to measure weak - acid strength - given by the ratio of the product of the products' molar concentrations to the product of the reactants' molar concentrations - with each term raised to the power of its stoichiometric






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






3. 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.






4. 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






5. 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






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






7. When a solute is dissolved in a solvent - it will dissociate until reaching an equilibrium point at which the rate of dissociation equals the rate of precipitation of the solute - regardless of any additional solute introduced into the mixture






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






9. The center of the atom which contains the protons and neutrons; in cells - structure that contains the cell's genetic material (DNA) and controls the cell's activities






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






11. 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






12. 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






13. Region in a molecule where atomic orbitals overlap - resulting in either a stable low - energy bonding orbital or an unstable high - energy antibonding orbital.






14. Play- by- play showing the individual steps of a reaction - including the formation and destruction of any reaction intermediates that may occur.






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






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






17. A reaction in which two or more substances combine to form a single substance A+B>>>>>>>C






18. 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


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






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






21. 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


22. A measured amount of a solution of unknown concentration is added to a known volume of a second solution until the reaction between them is just complete






23. 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.






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






25. 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.






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






27. A horizontal row of elements in the periodic table






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






29. Chalcogens - - Oxide O






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






31. 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






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






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






34. 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.






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






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






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






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






39. A graph of pressure versus temperature that shows the conditions under which the phases of a substance exist






40. An ionic compound that resists changes in its pH






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






43. 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.






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






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






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






47. Named after their cation and anion






48. 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


49. 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






50. (chemistry) the sum of the relative atomic masses of the constituent atoms of a molecule