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MCAT Organic 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. More likely it is to attract positively charged proton. nucleophilic strength decreses: RO->HO>RCO2>ROH>H2O






2. Object that is not superimposable upon mirror image






3. Occur when a molecule is broken down by heat. used to reduce the avverage molecular weight of heavy oils. c - c - bonds are cleave dand make small chain alkyl radicals that recombine to form different alkanes






4. Nonterminal alkenes are cleaved to form two molar equivalent of carvoxylic acid ..make keton






5. When two atomic orbitals combine. obtained mathematically by adding or subtracting wave functions. if sings are the same - make bonding - if different - less stable antibonding.






6. Two p orbital form pi and third p orbital combine with s to make two sp hybrid. 180 degree apart






7. Non mirror image of configurational isomers. cis and trans alkenes are them. possible when a molecule has two or more stereogenic centers that differ at some but not alll of the centers. they require multiple chiral centers.






8. Most favorable of staggared conformations






9. What are the best leaving groups?






10. What is produced when o3 with lialh4 or nabh4






11. How many stereoisomers can a molecule have with n chiral centers






12. Carbon with four different substituents and lack a plane of symmetry






13. Alkenes oxidzed with kmno4 - if made with cold - dilue - make OH on each side of double bond - diols or glycol in syn orientation






14. Moleculse that have the opposite configuration at their one chiral center. or if multiple chiral centers - must have the opposite configuration at every one of their chiral centers to be enantiomers. identical physical properties and much of the same






15. Compounds with halogen






16. Electrons of pi bond are reactive and easily attacked by molecules that want e pair e.g. electrophiles.






17. One s and three p orbitals






18. Configuration in relation to another chiral molecule. use it to determine if a molecule is an enantiomer - diastereomer - etc






19. Carbon double bonded to an oxygen






20. Iso - neo - cyclo






21. Refers to the =CH2 group






22. Same chemical formula. same atomic connectivity . different in how atoms are arranged in space






23. Same molecular formula but different structure






24. Nitrogen containing compound - longest chain attached to nitrogen used in backbone. use e and replace with AMINE. if more complex molecule present - use prefix amino. IF additional group added - use N-






25. When bond angles deviate from ideal values






26. Hydrocarbon with one or more carbon carbon triple bond






27. When two p orbitals line up in parallel and electron clouds overlap. it exsits over a single bond.






28. A = observed rotation / concentration * length






29. In which one or morehydrogen atoms are replaced with a halogen atom. via free radical substitution






30. Differ in position of substitutents attached to a double bond or cycloalkane. Cis or trans or e or z






31. Diol with hydroxyl group on same carbon






32. If a compound is able to rotate plane polarized light.






33. Methyl are 60 degrees apart. kinda stable






34. Y = position of double bond - x is position of triple bond - root is the prefix representing the length of the principal carbon chain






35. Ozonolysis under hot acidic kmO4 - e.g. H2O2 condition






36. Palladium or barium sulfate (BaSO4) with quinoline. occur on metal surface - make cis.

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37. Is bonded to only one other carbon atom






38. E of double bond act as lewis base and react with hydrogen of hx. make carbocation intermediate. use markonikovs rule






39. Rotations cancel each other out therefore no optical activity






40. Goal is to produce most stable carbocation

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41. Steps of free radical substitution






42. A molecule with an internal plane of symmetry






43. Transfer of electrions from one atome to another






44. Describes the exact spatial arrangement of groups of atoms independent of other molecules.






45. Diborane add to double bond. boron acts as lewis acid and attaches to less hindered carbon. hydride transferred to adjacent carbon. antimarkonikov - alcohol produced






46. Carbonyl located at the end of the chain named by replacing al with e. e.g. butanal






47. If reagent has a bunch of oxygen






48. Charged - need electrons






49. Name for ethanal






50. Three different substitutents often have plane of symmetry. and rotation of 180 will allow molecule to be superimposed on mirror image