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. 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


2. A definite stable energy that a physical system can have






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






4. 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-






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






6. 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






7. 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.






8. 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






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






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






11. 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






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






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






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






15. Simplest whole # ration of atoms in a compound






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






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






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






19. 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.






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






21. An ionic compound that resists changes in its pH






22. A horizontal row of elements in the periodic table






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






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






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






26. Chalcogens - - Oxide O






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






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






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






30. Halogens; ns2np5 - - 2nd most reactive group - The Halogens; very active because of need to fill; form -1 ions; 7 electrons in valence shell; tend to form salts with elements from groups 1A and 2A






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






32. The vapor pressure of solution is the product of the mole fraction of the solvent and the vapor pressure of the pure solvent. P_a=X_aP_total

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


33. 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


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






35. 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.






36. 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






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






38. Small discrete increments of energy.






39. Nh/2p The angular momentum changes only in discete amounts with respect to the quantum number. Also E=- R_h/n^2






40. The slowest elementary step which is the limit for the rate of the other steps






41. 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






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






43. 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






44. 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


45. Spectrum of certain absorbed wavelengths of light corresponding to an atom's spectrum of emitted frequencies of light. Unique to each element. AAS can be used to indentify an element.






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






47. In a solution - the substance that dissolves in the solvent






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






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






50. The lowest allowable energy state of an atom