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






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






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

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






5. The area of chemistry that is concerned with reaction rates and reaction mechanisms






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






8. 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.






9. Side - to side parallel orbitals overlap to share electrons - the 2nd/3rd covalent bond between two atoms - cannot rotate and maintain the bond.






10. Have the shape of a sphere - with the center of the sphere at the nucleus; completely symmetrical along all axes; 1s orbital is spherically symmetric and has no nodes; 2s orbital is also spherical but contains a node and is higher in energy






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






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






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






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






16. Simplest whole # ration of atoms in a compound






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






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






19. 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






20. 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






21. Alkaline Earth Metals - 2 valence electrons +2 ions - Magnesium Mg






22. 5 different orbitals shaped like clover leaves and max electrons is 10






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






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






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






26. 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






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






28. The process by which a gas escapes from one container to another at lower pressure through a tiny hole in the container.






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






30. 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






31. Orbitals of equal energy are each occupied by one electron before any orbital is occupied by a second electron - and all electrons in singly occupied orbitals must have the same spin

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






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






35. The weight in grams of compound that can be substituted by 1 atom of Hydrogen. GEW = MW / # of acidic Hyrdogens






36. 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.






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






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






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






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






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






42. Two or more atoms held together by covalent bonds






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






44. A solid made up of particles that are not arranged in a regular pattern.






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






46. E=hc/?






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






48. A set of frequencies of electromagnetic waves given off by atoms of an element; consists of a series of fine lines of individual colors






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






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