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






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






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






4. 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






5. (chemistry) a substance that changes color to indicate the presence of some ion or substance






6. A horizontal row of elements in the periodic table






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






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






9. The ratio of the actual yield to the theoretical yield for a chemical reaction expressed as a percentage; a measure of the efficiency of a reaction






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






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






12. 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






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






14. The lowest allowable energy state of an atom






15. An ionic compound that resists changes in its pH






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






17. A solution in which water is the solvent






18. 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.






19. Temperature is constant; effusion and temperature are proportional to the square root of their masses

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20. Sum of all the masses - in AMU - present in one molecule of a molecular compound.






21. 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.






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






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






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






25. 4 valence electrons +4 - -4 ions. - Carbon Group can form covalent bonds with nonmetals. Only carbon forms strong pi bonds






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






27. Named after their cation and anion






28. Contains nonmetals that are non - reactive. Full outermost energy level except helium which has 2.






29. 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






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






31. Alkali metals: highly reactive - therefore always compounds. - 1 valence electron +1 ion - Hydrogen H? - Lithium Li? - Sodium Na? - Potassium K? - Rubidium Rb? - Cesium Cs?






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






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






34. The number of atoms in exactly 12 g of pure 12c and equal to 6.022 x 10^23 is called






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






36. Set of spectral lines appearing in the UV region when a hydrogen atom undergoes a transition from energy levels n>1 to n=1.






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






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






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






40. 5 valence electrons -3 ions - Nitride N






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






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






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






45. 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






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






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






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






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






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