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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 area of chemistry that is concerned with reaction rates and reaction mechanisms






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






4. 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






5. 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






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






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






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






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






10. E=hc/?






11. 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






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






13. The ratio of the actual yield to the theoretical yield for a chemical reaction expressed as a percentage; a measure of the efficiency of a reaction






14. States that it is impossible to determine simultaneously both the position and momentum of an electron or any other particle






15. 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






16. 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






17. Named after their cation and anion






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






19. Theory stating that the rate of a reaction is directly proportional to the number of collisions that take place between reactants per second.






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






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






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






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






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






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






26. The point on a phase diagram that represents the only set of conditions at which all three phases exist in equilibrium with one another






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






28. The lowest allowable energy state of an atom






29. 5 valence electrons -3 ions - Nitride N






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






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






32. Simplest whole # ration of atoms in a compound






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






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






35. 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






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






37. 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






38. A fundamental constant - h - that relates the energy of light quanta to their frequency: h = 6.6 X 10^-34 joule

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39. 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






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






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






42. 2.18 x 10^-18 J/electron






43. 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






44. Expression of auto - ionization of water into H+ and OH- at a certain temperature - given by the product of the ions' molar concentrations. Denoted by Kw and equal to 10-






45. A structural formula in which electrons are represented by dots; dot pairs or dashes between two atomic symbols represent pairs in covalent bonds.






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






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






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






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






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