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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. Bound to same atom

2. Anti-alignment required

3. R-SO3H

4. OCH3

5. 4-pi system + 2-pi system --> Ring formation

6. Nucleophile adds to ketone (forming alcohol)

7. Oxidize to -CHO

8. Differ in position of atoms

9. Split an alkene into 2 carbonyls

10. H2O2

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

12. Allylic Substitution

13. CH2-

14. Formation of ethoxide

15. 2 Sulfide linkages in place of aldehyde

16. Elimination to form alkene

17. R2C=N-OH

18. Oxirane ring opening

19. Cycloformation

20. Reduces one bond of benzene ring

21. Highly reactive carbonyl

22. Thionyl chloride

23. Benzaldehyde

24. Cis/trans Isomers

25. Differ in fixed geometrical arrangement of atoms

26. Reduces ketone to alkane

27. Alcohol closes ring to form oxirane

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

29. Donate electrons to aromatic ring

30. Bound to adjacent atoms

31. Cyclic ether

32. Attach tosyl group onto alcohol

33. Differ in rotation about sigma bonds

34. Aldehyde / ketone synthesis

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

36. Non-superimposable mirror image

37. Tertiary carbon center; racemic

38. Reduces Ar-CH3 to -COOH

39. Replaces thioacetal/ketal with carbonyl

40. Oxidize to -COOH

41. Less hindered carbon center; chiral inversion

42. Tertiary carbocation formed; relieved by deprotonation

43. Ch2I2 - Zn(Cu)

44. Less substituted elimination; sterically hindered

45. Forms carboxylic acid; releases N

46. Ph-NH2

47. More substituted elimination; more stable

48. Splits an ether into alkyl halides

49. Formation of salcohol from alkene

50. Chiral - with superimposable mirror image