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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. Chalcogens - - Oxide O






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






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






4. 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.






5. A solution in which water is the solvent






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






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






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






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






10. Gram equivalent weight of solute per liter of solution - often denoted by N.






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






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






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






14. The process by which one or more substances change to produce one or more different substances






15. 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.






16. The nuclear charge experienced by the outermost electrons of an atom (actual charge minus the shielding caused by inner shells: Z- eff)






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






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






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


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






21. A chemical bond in which one atom loses an electron to form a positive ion and the other atom gains to electron to form a negative ion






22. An ionic compound that resists changes in its pH






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






24. 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






25. Valence Shell Electron Pair Repulsion theory - stating that the three - dimensional molecular geometry about some central atom is determined by the elctronic repulsion between its bonding and nonbonding electron pairs.






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






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






28. An atom or group of atoms that has a positive or negative charge






29. 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






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






31. The ratio of the number of moles of solute dissolved in one kilogram of solvent. molality (M = moles solute/kg of solution)






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






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






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






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


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






38. 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






39. 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






40. 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






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






42. Specifies the specific orbital in which the electron is most likely to be found. - Third quantum number - designated as ml. Describes a particular orbital within a subshell where an electron is very likely to be found. Possible values are integers in






43. An element in an 'A' group in the periodic table; as a group these elements display a wide range of physical and chemical properties. In their atoms - the s and p sublevels in the highest occupied energy level are partially filled






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






45. 5 different orbitals shaped like clover leaves and max electrons is 10






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






47. 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






48. Where half of the acid is neutralized by the base on a titration curveAn acid dissociation constant - Ka - (also known as acidity constant - or acid - ionization constant) is a quantitative measure of the strength of an acid in solution. It is the eq






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






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