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






2. 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






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






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






5. 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






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






7. Product of the molar concentrations of dissociated ions in solution at saturation - where each ion is raised to the power of its stoichiometric coefficient. Denoted Ksp.






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






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






10. 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.






11. (chemistry) separation of a substance into two or more substances that may differ from each other and from the original substance C>>>>A+B






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






13. 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.






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






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






16. 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.






17. Any sample of a given compound will contain the same elements in the identical mass ratio.






18. A dynamic condition in which two opposing changes occur at equal rates in a closed system






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






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






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






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






23. 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






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






25. 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






26. 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.






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






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






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






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






31. 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.






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






33. The Percent by mass of each element in a compound.






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






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






36. A horizontal row of elements in the periodic table






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






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






39. 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






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






41. An uncharged molecule with a single unpaitred electron in its outer ring - very unstable - exists for only about 10 seconds






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






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






44. 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






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






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






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






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






49. Nh/2p The angular momentum changes only in discete amounts with respect to the quantum number. Also E=- R_h/n^2






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







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