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






2. The quantum number that has only two possible values - +1/2 and -1/2 - which indicate the two fundamental spin states of an electron in an orbital






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






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






5. 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.






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






7. 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






8. Named after their cation and anion






9. No two electrons or protons or neutrons in a given system can be in states characterized by the same set of quantum numbers






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






11. A reaction where a compound does Not change its molecular structure.






12. 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






13. A chemical formula showing the ratio of elements in a compound rather than the total number of atoms






14. 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






15. 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


16. 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


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






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






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






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






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






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






23. 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






24. E=hc/?






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






26. 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






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






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






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






30. 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






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






32. 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






33. 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






34. 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






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






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






37. (chemistry) p(otential of) H(ydrogen)






38. When polar molecules orient themselves such that the positive region of one molecule is close to the negative region of another molecule.






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






40. 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






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






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






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






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






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






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






47. 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.






48. Mixture of 2 or more substances that distills at a constant temperature and with constant composition - even though seperately the components have different boiling points






49. 4 valence electrons +4 - -4 ions. - Carbon Group can form covalent bonds with nonmetals. Only carbon forms strong pi bonds






50. 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.