15. Which of the following is aromatic?(A) cycloheptatrienyl cation (B) 1,3,5-hexatriene(C) cyclobutenyl anion(D) 1,3-cyclohexadiene(E) cyclopentadienyl cation

15. Which of the following is aromatic?
(A) cycloheptatrienyl cation
(B) 1,3,5-hexatriene
(C) cyclobutenyl anion
(D) 1,3-cyclohexadiene
(E) cyclopentadienyl cation

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統計： A(0), B(0), C(1), D(0), E(0) #3829714

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2026/05/30

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21. Which of the following statements correctly describes the contribution of △S° to△G°?(A) The entropy term makes a greater contribution to AG° at high temperatures.(B) The entropy term makes a greater contribution to AG° at low temperatures.(C) The entropy term makes a greater contribution to AG° in exothermic reactions.(D) The entropy term makes a greater contribution to AG° in endothermic reactions.(E) The entropy term always makes a more significant contribution to AG° than does the enthalpy term.

15. Which of the following is aromatic?
(A) cycloheptatrienyl cation
(B) 1,3,5-hexatriene
(C) cyclobutenyl anion
(D) 1,3-cyclohexadiene
(E) cyclopentadienyl cation

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