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






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






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






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






5. 4 valence electrons +4 - -4 ions. - Carbon Group can form covalent bonds with nonmetals. Only carbon forms strong pi bonds






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






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






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






9. At a constant pressure - the volume of an ideal gas is directly proportinal to its temperature: V (a) T

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


10. The quantum number that has only two possible values - +1/2 and -1/2 - which indicate the two fundamental spin states of an electron in an orbital






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






12. 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






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






14. 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






15. 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.






16. The reaction of the ions that characterize acids and the ions that characterize bases to form water molecules and a salt






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






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






20. 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-






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






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






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






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






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






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






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






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






29. 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






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






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






32. Standard Temperature and Pressure. 273 Kelvin (0 Celsius) - 1 atmosphere (760 torr - 760 kPA).






33. 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


34. 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






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






36. A horizontal row of elements in the periodic table






37. 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






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






39. Two or more atoms held together by covalent bonds






40. 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






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






42. The weak attractive forces between molecules resulting from the small - instantaneous dipoles that occur because of the varying positions of the electrons during their motion about nuclei






43. Property of the elements that can be predicted from the arrangement of the periodic table






44. Defined acids as subtsances that produced H ions in water - while bases produced OH ions. When they reacted together - H and OH neutralise to make water






45. 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.






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






47. 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


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






49. 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.






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