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






2. 5 different orbitals shaped like clover leaves and max electrons is 10






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






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


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






6. Substance in which a solute is dissolved to form a solution






7. A model of acids and bases which an acid is hydrogen ion donor and base is a hydrogen ion acceptor.






8. 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






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






10. 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






11. 5 valence electrons -3 ions - Nitride N






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






13. An emperimentally determined mathmatical expression showing the rate of a reaction as a function of the concentration of its reactants






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






15. 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






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






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






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






19. (chemistry) a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight






20. 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.






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






22. A structural formula in which electrons are represented by dots; dot pairs or dashes between two atomic symbols represent pairs in covalent bonds.






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






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






25. 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.






26. (physics) the smallest discrete quantity of some physical property that a system can possess (according to quantum theory) E=hf






27. Have three valance electrons. In certain instances - some elements will loose three electrons - but they will also share electrons with another element to attain stability.






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






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






30. 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.






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






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






33. Alkaline Earth Metals - 2 valence electrons +2 ions - Magnesium Mg






34. 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






35. 2.18 x 10^-18 J/electron






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






37. Tells you how much solute is present compared to the amount of solvent






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






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






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






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






42. 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-






43. 4 valence electrons +4 - -4 ions. - Carbon Group can form covalent bonds with nonmetals. Only carbon forms strong pi bonds






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






45. 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






46. 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






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






48. 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






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






50. Second quantum number - designated by the letter 'l.' This 'angular momentum' refers to the subshells within each principle quantum energy level. It can take on the value of an integer in the 0 to (n -1) range. The four subshellscorresponding to l=0