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MCAT Chemistry

Subjects : mcat, science
Instructions:
  • Answer 50 questions in 15 minutes.
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  • Match each statement with the correct term.
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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 amount of product that can be made in a chemical reaction based on the amount of limiting reactant






2. 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






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






4. Simplest whole # ration of atoms in a compound






5. Named after their cation and anion






6. The energy required to remove an electron from a gaseous atom; generally increases in moving from left - to - right across a period and decreases in moving down a group






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






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






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






10. A physical property of a solution that depends on the number - but not the identity - of the disswolved solute particles; example properties include vapor pressure lowering - boiling point elevation - osmotic pressure - and frezzing point depression






11. Elements in the middle of the periodic table - in groups 3-12.






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






13. 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






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






15. The average distance between the nuclei of two bonded atoms






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






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






18. An elementary particle with 0 charge and mass about equal to a proton






19. 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






20. Two or more atoms held together by covalent bonds






21. The percent by mass of each element in a compound






22. A set of spectral lines that appear in the visible light region when a hydrogen atom undergoes a transition from energy levels n>2 to n=2.






23. The lowest allowable energy state of an atom






24. Product of the molar concentrations of dissociated ions in solution at any point in the reaction other than equilibrium or saturation - where each ion is raised to the power of its stoichiometric coefficient. Denoted IP.






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






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






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






28. The Percent by mass of each element in a compound.






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

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






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






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






33. A substance that - when dissolved in water - results in a solution that can conduct electricity






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






35. 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






36. 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.






37. 5 valence electrons -3 ions - Nitride N






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






39. 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






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






41. 1913 - Niels Bohr - said that electrons formed specific layers instead or random ones - said atoms atoms absorb and give off energy when the electrons move from one shell to another






42. The weak attractive forces between molecules resulting from the small - instantaneous dipoles that occur because of the varying positions of the electrons during their motion about nuclei






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






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






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






46. 4 valence electrons +4 - -4 ions. - Carbon Group can form covalent bonds with nonmetals. Only carbon forms strong pi bonds






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






48. 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






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






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