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






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

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






4. 2.18 x 10^-18 J/electron






5. (chemistry) separation of a substance into two or more substances that may differ from each other and from the original substance






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






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






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






9. 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.






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






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






12. Chalcogens - - Oxide O






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






14. 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.






15. 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.






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






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






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






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






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






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






22. A reaction where a compound does Not change its molecular structure.






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






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






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






26. A fundamental constant - h - that relates the energy of light quanta to their frequency: h = 6.6 X 10^-34 joule

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






28. The solubility of a gas in a liquid is directly proportional to the partial pressure of that gas on the surface of the liquid

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






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






31. A solution in which water is the solvent






32. The weight in grams of compound that can be substituted by 1 atom of Hydrogen. GEW = MW / # of acidic Hyrdogens






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






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






35. 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






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






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






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






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






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






41. Two or more atoms held together by covalent bonds






42. Named after their cation and anion






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






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






45. 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






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






47. 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






48. 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.






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






50. The energy required to break a chemical bond and form neutral isolated atoms







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