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Openai/6946f4fa-e8bc-800b-b77e-c62f6390a97c
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=== ## === 主題：MO 理論整合｜NO 系列｜苯與芳香性｜鍵能｜混成終極題 ==== ### ==== EN Which charge(s) on an O₂ ion would give a bond order of 2.5? 中 O₂ 帶哪一種電荷時，其鍵階（bond order）為 2.5？ a. −2 b. −1 c. +1 d. two of these e. none of these ===== - O₂（中性）：鍵階 = 2 ===== * 移除 1 個反鍵電子 → 鍵階 +0.5 ===== - O₂⁺：少 1 個電子（來自反鍵） ===== BO=2+0.5=2.5\text{BO} = 2 + 0.5 = 2.5BO=2+0.5=2.5 ===== ✅ c. +1 ===== ==== ### ==== EN Which of the following statements is false? 中 下列哪一個敘述是錯誤的？ a. C₂ is paramagnetic. b. C₂ is diamagnetic. c. The C–C bond in C₂²⁻ is stronger than that in CH₃CH₃. d. The C–C bond in C₂²⁻ is shorter than that in CH₃CH₃. e. Two of the above. ===== - C₂：所有電子成對 → 抗磁性 → a 錯、b 對 ===== * C₂²⁻：鍵階 = 3 * CH₃CH₃：鍵階 = 1 → c、d 皆正確 ===== ✅ a ===== ==== ### ==== EN Which of the following statements is incorrect? 中 下列哪一個關於 MO 理論 的敘述是錯誤的？ ===== - a：NO 有未成對電子 → MO 模型較佳 ✔ ===== * b：反鍵電子一定造成順磁性 ✘ → 是否順磁取決於「是否成對」 * c：AO 組合成 MO ✔ * d：反鍵軌域能量較高 ✔ ===== ✅ b ===== ==== ### ==== EN Consider the molecular orbital description of the NO⁻ anion. Which statement is false? 中 考慮 NO⁻ 的分子軌域描述，下列哪一個敘述是錯誤的？ ===== | | | | | ===== | --- | --- | --- | --- | | | | | | | | | | | | | | | | ===== - a：NO⁻ 為順磁 ✘ ===== * b：等電子（考試中視為正確）✔ * c：NO⁺ 鍵能 > NO⁻ ✔ * d：NO⁻ 鍵階 = 2 ✔ ===== ✅ a ===== ==== ### ==== EN Which statement about benzene is true? 中 下列哪一個關於 苯（benzene） 的敘述是正確的？ ===== - 苯中所有 C 為 sp² ===== * 六個 C–C 鍵等價 * 平均鍵階 = 1.5 ===== ✅ c ===== ==== ### ==== EN Which of the following does NOT contain a central atom with d²sp³ hybridization? 中 下列哪一個不是 d²sp³ 混成？ ===== - XeF₅⁺：6 電子域 ===== * IF₄⁻：6 電子域 * SF₆：6 電子域 * SeF₅⁻：6 電子域 全部皆為 d²sp³ ===== ✅ e ===== ==== ### ==== EN Which statement about benzene is false? 中 下列哪一個關於苯的敘述是錯誤的？ ===== - π 鍵來自 未混成 p 軌域 ===== * 不是 sp² 軌域形成 π 鍵 ===== ✅ e ===== ==== ### ==== EN Which species contains the strongest bond? 中 下列哪一個物種具有最強的鍵？ ===== - 鍵強度 ∝ 鍵階 ===== * N₂：鍵階 = 3（最大） ===== ✅ a. N₂ ===== ==== ### ==== EN Which has the highest bond dissociation energy? 中 哪一個具有最高的鍵解離能？ ===== - 與 Q58 同理 ===== * 鍵階最大者 → 鍵解離能最大 ===== ✅ a. N₂ ===== ==== ### ==== EN What is the hybridization of the central atom in I₃⁻? 中 I₃⁻ 中心原子的混成為何？ ===== - 中心 I： - 2 鍵對 - 3 孤對 → 5 電子域 ===== ===== ✅ d. dsp³ =====
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