資訊推薦

• 13. An electron in a one-dimensional box requires energy with wavelength 8080 nm to excite it from t
• 14. The energy expressions for the electrons in the Het ion and the hydrogen atom areEn(H)=-a\/n2 a
• 15. The wavelength of light associated with the n = 2 to n = 1 electron transition in the hydrogen s
• 11. The structure below is a potent analgesic agent (pain reliever) (J. Med. Chem., 2009, 5685). How
• 12. How many methylene groups are present in 2,4-dimethylhexane? (A)0 (B)1 (C) 2(D)6
• 13. Among the butane conformers, which occur at energy minima on a graph of potential energy versus
• 14. Which of the following species is not formed through a termination reaction in the chlorination
• 15. If the equilibrium constant (Keq) of a reaction is 0.5 then which of the following that must be
• 16. Which is a measure of the randomness of a system? (A)entropy (B)enthalpy (C) free energy(D)halog
• 17. Which of the following statements correctly describes the contribution of ΔS°toΔG°?(A)The entrop
• 18. Which of the following is true for the initiation step of a free radical chlorination reaction?
• 19. What term describes the structural relationship between cis-1,2-dimethylcyclopentane and trans-1
• 16. A strip of copper is placed in a 1 M solution of copper nitrate, and a strip of silver is placed
• 20. What is the structural relationship between the two molecule shown below?(A)constitutional isome
• 17. The standard potential for the reaction is 0.51 V. What is the equilibrium constant K for this r
• 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