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

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


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






3. One - half of the distance between the center of identical atoms that are not bonded together. Since effective nuclear charge increases when moving from left to right each additional electron is pulled more strogly toward the nucleus.






4. 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


5. 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






6. 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






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






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






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






10. (physics) the smallest discrete quantity of some physical property that a system can possess (according to quantum theory) E=hf






11. A chemical reaction involving the transfer of one or more electrons from one reactant to another; also called oxidation - reduction reaction.






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






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






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






15. An atom or group of atoms that has a positive or negative charge






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

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


17. Defined acids as subtsances that produced H ions in water - while bases produced OH ions. When they reacted together - H and OH neutralise to make water






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






19. 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






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






21. Simplest whole # ration of atoms in a compound






22. An ionic compound that resists changes in its pH






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






24. Sum of all the masses - in AMU - present in one molecule of a molecular compound.






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






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






27. Two or more atoms held together by covalent bonds






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






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






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






31. The amount of energy that reactants must absorb before a chemical reaction will start; also called free energy of activation.






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






33. 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






34. PH of a molecule at which it contains no net electric charge - isoelectric point.






35. 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






36. 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






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






38. 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.






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






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






41. 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






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






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






44. 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






45. PH=pka+log[base/acid] Used in titration based problems that relates the pH or pOH of a solution to the pK and the ratio of the dissociated species.






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






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






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






49. 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






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