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Gaokao Chemistry Practice Question

下列事实不能通过比较氟元素和氯元素的电负性进行解释的是

  1. A.$\mathrm{F-F}$ 键的键能小于 $\mathrm{Cl-Cl}$ 键的键能
  2. B.三氟乙酸的 $K_\mathrm{a}$ 大于三氯乙酸的 $K_\mathrm{a}$
  3. C.氟化氢分子的极性强于氯化氢分子的极性
  4. D.气态氟化氢中存在 $\mathrm{(HF)_2}$，而气态氯化氢中是 $\mathrm{HCl}$ 分子

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