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






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






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






4. The weight in grams of one mole of a given elementand is expressedin tems of grams per mole.






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






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






7. Structure that occurs when it is possible to draw two or more valid electron dot structures that have the same number of electron pairs for a molecule or ion






8. Valence Shell Electron Pair Repulsion theory - stating that the three - dimensional molecular geometry about some central atom is determined by the elctronic repulsion between its bonding and nonbonding electron pairs.






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






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






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






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






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






14. 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






15. 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.






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






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






18. A chemical reaction involving the transfer of one or more electrons from one reactant to another; also called oxidation - reduction reaction.






19. 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






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






21. A chemical reaction involving the transfer of one or more electrons from one reactant to another; also called oxidation - reduction reaction.






22. 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






23. The center of the atom which contains the protons and neutrons; in cells - structure that contains the cell's genetic material (DNA) and controls the cell's activities






24. Attractions between molecules caused by the electron motion on one molecule affecting the electron motion on the other through electrical forces; these are the weakest interactions between molecules






25. 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






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






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






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






29. Systematic pairing of a deprotonated species (base) with its protonated form (conjugate acid). Conjugates appear on opposite sides of a chemical equation.






30. 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






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






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






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






34. A base that can accept two moles of H+ per mole of itself (ex: SO4






35. An ionic compound that resists changes in its pH






36. 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






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






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






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






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






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






42. 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






43. Contains nonmetals - 7 valence electrons in it's outermost energy level. Very reactive






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






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






46. 5 different orbitals shaped like clover leaves and max electrons is 10






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






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






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






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