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






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






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






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






5. The solubility of a gas in a liquid is directly proportional to the partial pressure of that gas on the surface of the liquid

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






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






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






10. 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






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






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






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






14. 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






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






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






17. Chalcogens - - Oxide O






18. (chemistry) a substance that changes color to indicate the presence of some ion or substance






19. 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






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






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






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






23. (chemistry) a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight






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






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






26. An atom - ion - or molecule that donates an electron pair to form a covalent bond.






27. 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






28. Rare earth element group (elements 58-71)






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






30. At a constant pressure - the volume of an ideal gas is directly proportinal to its temperature: V (a) T

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31. Redox reaction - in which the same species is both oxidized and reduced.






32. 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






33. 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






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






35. Have three valance electrons. In certain instances - some elements will loose three electrons - but they will also share electrons with another element to attain stability.






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






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






38. Two or more atoms held together by covalent bonds






39. 5 valence electrons -3 ions - Nitride N






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






41. 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.






42. The amount of a substance that contains as many particles as there are atoms in exactly 12g of carbon -12






43. Named after their cation and anion






44. Simplest whole # ration of atoms in a compound






45. The lowest allowable energy state of an atom






46. 2.18 x 10^-18 J/electron






47. 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.






48. 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.






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






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