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






2. One - half the distance between the nuclei of two atoms of the same element when the atoms are joined






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






4. Have the shape of a sphere - with the center of the sphere at the nucleus; completely symmetrical along all axes; 1s orbital is spherically symmetric and has no nodes; 2s orbital is also spherical but contains a node and is higher in energy






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






6. 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






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






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






9. 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






10. Two or more atoms held together by covalent bonds






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






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






14. The formation of one or more covalent bonds between an electron pair donor and an electron pair acceptor






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






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






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






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






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






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






21. 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


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






23. 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






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






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






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






27. 5 different orbitals shaped like clover leaves and max electrons is 10






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






29. An atom - radical - or molecule that has gained or lost one or more electrons and has a negative or positive charge






30. Chalcogens - - Oxide O






31. A horizontal row of elements in the periodic table






32. When dipoles are dissolved in a solution where ions are present ions wil arrange themselves with the opposite charged end of the dipole.






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






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






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






36. The sum of the exponents in a rate law - where each exponent provides the reaction order with respect to its reactants






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






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






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






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






41. 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






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






43. Energy released when an atom or ion in the gaseous state gains an electron. Increases from left to right and from bottom to top on the Periodic Table.






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






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






46. An ionic compound that resists changes in its pH






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






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






49. 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.






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