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Gaokao Chemistry Practice Question

5. （3 分) 若 $\left(\mathrm{NH}_{4}\right){ }_{2} \mathrm{SO}_{4}$ 在强热时分解的产物是 $\mathrm{SO}_{2} 、 \mathrm{~N}_{2} 、 \mathrm{NH}_{3}$ 和 $\mathrm{H}_{2} \mathrm{O}$, 则该 反应中化合价发生变化和末发生变化的 $\mathrm{N}$ 原子数之比为（）

  1. A.$1: 4$
  2. B.$1: 2$
  3. C.$2: 1$
  4. D.$4: 1$

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