Test your basic knowledge |

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






2. An acid that will completely dissociate in aqueous solution - like HCl - HI - HClO4 HBr.






3. 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

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183


4. 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






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






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






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






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






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






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






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






12. 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






13. 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






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






15. Solids in which the particles are arranged in a repeating - 3- D pattern - has a specific melting point - classified as ionic network covalent - metallic or molecular.






16. 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.






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






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






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






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






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






22. The quantum number that indicates the main energy level occupied by the electron. Can theoretically take on any positive interger. Denoted by the letter n.






23. The formation of one or more covalent bonds between an electron pair donor and an electron pair acceptor






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






25. An element in an 'A' group in the periodic table; as a group these elements display a wide range of physical and chemical properties. In their atoms - the s and p sublevels in the highest occupied energy level are partially filled






26. The energy required to remove an electron from a gaseous atom; generally increases in moving from left - to - right across a period and decreases in moving down a group






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






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






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






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






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






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






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






34. Alkali metals: highly reactive - therefore always compounds. - 1 valence electron +1 ion - Hydrogen H? - Lithium Li? - Sodium Na? - Potassium K? - Rubidium Rb? - Cesium Cs?






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

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183


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






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






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






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






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






41. 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






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






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






44. A solution in which water is the solvent






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






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






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






48. 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






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






50. 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