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GRE Chemistry Organic

Subjects : gre, science, chemistry
  • Answer 50 questions in 15 minutes.
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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. Highly reactive carbonyl

2. Formation of ethoxide

3. Bound to same atom

4. H2O2

5. Oxirane ring opening

6. Aldehyde / ketone synthesis

7. Attach tosyl group onto alcohol

8. CH2-

9. Best with electron withdrawing group ortho/para to substitution site

10. Cyclic ether

11. R-SO3H

12. Reduces ketone to alkane

13. Cycloformation

14. R2C=N-OH

15. Uses Hg(OAc)2 + R'OH; forms ether from alkene

16. Nucleophile adds to ketone (forming alcohol)

17. Ph-NH2

18. Thionyl chloride

19. Non-superimposable mirror image

20. 4-pi system + 2-pi system --> Ring formation

21. Donate electrons to aromatic ring

22. Split an alkene into 2 carbonyls

23. More substituted elimination; more stable

24. Alcohol closes ring to form oxirane

25. Formation of salcohol from alkene

26. Oxidize to -CHO

27. Cis/trans Isomers

28. Reduces one bond of benzene ring

29. Tertiary carbon center; racemic

30. Forms carboxylic acid; releases N

31. OCH3

32. Oxidize to -COOH

33. Allylic Substitution

34. One carbon away from aryl group can be reduced with Pd / H2

35. Differ in rotation about sigma bonds

36. Chiral - with superimposable mirror image

37. Differ in fixed geometrical arrangement of atoms

38. 2 Sulfide linkages in place of aldehyde

39. R-NH2 + NaNO2/HCl --> R-N=N+ Cl-

40. Can protect a ketone

41. Benzaldehyde

42. Splits an ether into alkyl halides

43. Anti-alignment required

44. Bound to adjacent atoms

45. Tertiary carbocation formed; relieved by deprotonation

46. Replaces thioacetal/ketal with carbonyl

47. Elimination to form alkene

48. Reacts with alkene to form oxirane

49. Less hindered carbon center; chiral inversion

50. Ch2I2 - Zn(Cu)