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GRE Chemistry Organic

Subjects : gre, science, chemistry
Instructions:
  • Answer 50 questions in 15 minutes.
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  • 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. 2 Sulfide linkages in place of aldehyde






2. Reduces Ar-CH3 to -COOH






3. Reduces one bond of benzene ring






4. Bound to same atom






5. Differ in fixed geometrical arrangement of atoms






6. Non-superimposable mirror image






7. Bound to adjacent atoms






8. Ch2I2 - Zn(Cu)






9. R2C=N-OH






10. Splits an ether into alkyl halides






11. Cyclic ether






12. Formation of ethoxide






13. Forms carboxylic acid; releases N






14. Anti-alignment required






15. Less substituted elimination; sterically hindered






16. Split an alkene into 2 carbonyls






17. Aldehyde / ketone synthesis






18. Tertiary carbocation formed; relieved by deprotonation






19. Thionyl chloride






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






21. Less hindered carbon center; chiral inversion






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






23. Oxirane ring opening






24. Nucleophile adds to ketone (forming alcohol)






25. Alcohol closes ring to form oxirane






26. OCH3






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






28. CH2-






29. Can protect a ketone






30. Reduces ketone to alkane






31. Attach tosyl group onto alcohol






32. Chiral - with superimposable mirror image






33. Tertiary carbon center; racemic






34. Differ in rotation about sigma bonds






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






36. Highly reactive carbonyl






37. Reacts with alkene to form oxirane






38. Cis/trans Isomers






39. Oxidize to -CHO






40. Cycloformation






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






42. R-SO3H






43. Elimination to form alkene






44. H2O2






45. Formation of salcohol from alkene






46. Ph-NH2






47. Replaces thioacetal/ketal with carbonyl






48. Allylic Substitution






49. More substituted elimination; more stable






50. Benzaldehyde