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• 21. How many asymmetric carbon atoms are present in the molecule shown?(A)0 (B)1 (C) 2(D)3
• 22. Which of the statements below correctly describes an achiral molecule? (A)The molecule has a non
• 23. Which of the following structures are achiral and meso?(A)1 (B)2 (C) 3(D)4
• 24. Which of the following best describes the carbon-chlorine bond of an alkyl chloride? (A)nonpolar
• 25. Which of the following factors is favorable for nucleophilicity but not basicity? (A)highly pola
• 26. Which of the following compounds will undergo an SN2 reaction most readily? (A)(CH3)3CCH2I (B)(C
• 27. Which of the following alkyl halides reacts most rapidly via an SN1 solvolysis reaction in hot m
• 28. When a SN1 reaction of R-2-iodobutane takes place in hot methanol, the product ________. (A)is c
• 29. Identify the correct name for the following structure.(A)3-methoxy-5-methylcyclohepta-1,5-diene
• 30. For which of the following alkenes will cis- and trans- isomers not exist?(A)a) only (B)b) only
• 31. Using Zaitsev's rule, choose the most stable alkene among the following. (A)1-methylcyclohe
• 32. Consider the constitutional isomers 2-methylbut-1-ene, 2-methylbut-2-ene, and 3-methylbut-1-ene.
• 33. Which of the following alkenes has the smallest molar heat of hydrogenation (ie, releases the le
• 34. HBr can be added to an alkene in the presence of peroxides (ROOR). What function does the peroxi
• 18. Which of the following is not a valid resonance structure for N3-?(A)(B)(C)(D)(E) All are valid.
• 35. Provide the reagents necessary to complete the following transformation.(A)1. BH3∙THF 2. H2O2, H
• 36. Which of the following is the best reaction sequence to use if one wants to accomplish a Markovn
• 37. What is the correct IUPAC name for the following structure?(A)(Z) 4-methyl-3-hexen-1-thiol (B)(Z
• 19. Consider the following molecules.Ⅰ.BF3Ⅱ.CHBr3 (C is the central atom.)III. Br2 IV. XeCl2V. COVI.
• 20. Which of the following is diamagnetic? (A) H2+ (B) C2+ (C) N2+ (D) N2 (E) F2+
• 38. The reaction of CH3CH2MgBr with CH3COCH2CH3 gives ________. (A)an achiral product (B)a mixture o
• 39. Which alcohol reacts most rapidly with the Lucas reagent? (A)benzyl alcohol (B)methanol (C) 2-pr
• 21. Below is a phase diagram for compound X. You wish to purify a sample of X that was collected at
• 40. Which of the following oxidants will convert a primary alcohol to an aldehyde?1) sodium dichroma
• 22. Alkali halides commonly have either the sodium chloride structure or the cesium chloride structu