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






2. 4 valence electrons +4 - -4 ions. - Carbon Group can form covalent bonds with nonmetals. Only carbon forms strong pi bonds






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






4. A horizontal row of elements in the periodic table






5. Attractive and repulsive forces between molecules that are weaker than forces within molecules.






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






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






8. Chalcogens - - Oxide O






9. Product of the molar concentrations of dissociated ions in solution at any point in the reaction other than equilibrium or saturation - where each ion is raised to the power of its stoichiometric coefficient. Denoted IP.






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






11. An ionic compound that resists changes in its pH






12. The amount of product that can be made in a chemical reaction based on the amount of limiting reactant






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






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






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






16. When dipoles are dissolved in a solution where ions are present ions wil arrange themselves with the opposite charged end of the dipole.






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






18. An equilibrium expression used to measure weak - acid strength - given by the ratio of the product of the products' molar concentrations to the product of the reactants' molar concentrations - with each term raised to the power of its stoichiometric






19. The point during a titration when the number of H+ ions and OH- ions are equal. This is at the middle of the steepest part of the titration curve.






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






21. A set of spectral lines that appear in the visible light region when a hydrogen atom undergoes a transition from energy levels n>2 to n=2.






22. 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






23. Slightly less reactive than alkali metals - comprise group II






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






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

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26. The energy required to break a chemical bond and form neutral isolated atoms






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






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






29. 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.






30. 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






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






32. States that if a stress is applied to a system at equilibrium - the system shifts in the direction that relieves the stress.






33. 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






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






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






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






37. 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






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






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






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






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






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






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






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






45. Named after their cation and anion






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






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






48. 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






49. 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.






50. The percent by mass of each element in a compound