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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. R-SO3H

2. R2C=N-OH

3. Reduces ketone to alkane

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

5. Ph-NH2

6. Differ in rotation about sigma bonds

7. Reacts with alkene to form oxirane

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

9. Attach tosyl group onto alcohol

10. Replaces thioacetal/ketal with carbonyl

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

12. OCH3

13. Ch2I2 - Zn(Cu)

14. H2O2

15. Aldehyde / ketone synthesis

16. Thionyl chloride

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

18. Tertiary carbon center; racemic

19. Less hindered carbon center; chiral inversion

20. Benzaldehyde

21. CH2-

22. Bound to same atom

23. Bound to adjacent atoms

24. Chiral - with superimposable mirror image

25. Splits an ether into alkyl halides

26. Anti-alignment required

27. Differ in fixed geometrical arrangement of atoms

28. 4-pi system + 2-pi system --> Ring formation

29. Formation of salcohol from alkene

30. Nucleophile adds to ketone (forming alcohol)

31. Reduces one bond of benzene ring

32. Allylic Substitution

33. Cis/trans Isomers

34. Donate electrons to aromatic ring

35. Oxirane ring opening

36. Less substituted elimination; sterically hindered

37. Non-superimposable mirror image

38. Can protect a ketone

39. Oxidize to -CHO

40. Elimination to form alkene

41. More substituted elimination; more stable

42. Tertiary carbocation formed; relieved by deprotonation

43. Split an alkene into 2 carbonyls

44. Oxidize to -COOH

45. Alcohol closes ring to form oxirane

46. Forms carboxylic acid; releases N

47. Highly reactive carbonyl

48. Reduces Ar-CH3 to -COOH

49. Formation of ethoxide

50. Cycloformation