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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. R2C=N-OH

2. OCH3

3. Donate electrons to aromatic ring

4. H2O2

5. Ch2I2 - Zn(Cu)

6. Differ in rotation about sigma bonds

7. Nucleophile adds to ketone (forming alcohol)

8. Less hindered carbon center; chiral inversion

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

10. Benzaldehyde

11. 2 Sulfide linkages in place of aldehyde

12. Oxidize to -CHO

13. Cycloformation

14. Split an alkene into 2 carbonyls

15. Attach tosyl group onto alcohol

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

17. Cis/trans Isomers

18. Oxirane ring opening

19. Oxidize to -COOH

20. More substituted elimination; more stable

21. Can protect a ketone

22. Forms carboxylic acid; releases N

23. 4-pi system + 2-pi system --> Ring formation

24. Bound to adjacent atoms

25. Elimination to form alkene

26. Formation of salcohol from alkene

27. Ph-NH2

28. Differ in position of atoms

29. Tertiary carbocation formed; relieved by deprotonation

30. Reacts with alkene to form oxirane

31. Formation of ethoxide

32. Bound to same atom

33. Replaces thioacetal/ketal with carbonyl

34. Allylic Substitution

35. Chiral - with superimposable mirror image

36. Cyclic ether

37. Thionyl chloride

38. Highly reactive carbonyl

39. Alcohol closes ring to form oxirane

40. Less substituted elimination; sterically hindered

41. Aldehyde / ketone synthesis

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

43. Splits an ether into alkyl halides

44. Anti-alignment required

45. Tertiary carbon center; racemic

46. Non-superimposable mirror image

47. Differ in fixed geometrical arrangement of atoms

48. R-SO3H

49. Reduces one bond of benzene ring

50. Reduces ketone to alkane