如何使用DSE00 exam,有系統地打好 DSE 根基?
DSE00 exam 一共有五個科目,每個科目都有不同的課題和難度等級,你可以根據自己的需要選擇。
中四五的同學建議先操練課題, 中六的同學操練難度。
每個科目都有不同的課題和難度。
如何目標是 Lv4 ,可以操練 Easy 和 Medium 的題目。
如果目標是 Lv5 以上,並具有一定基礎,可以直接混合操練。
The given setup can be used for distillation.
Obtaining pure water from seawater is possible through distillation. (True)
Obtaining propane from diesel oil requires cracking, which is not supported. (False)
Obtaining oxygen from liquefied air requires fractional distillation, which is not supported. (False)
Correct Answer: A (1) only
Distillation is used to separate substances based on boiling points.
Cracking breaks down large hydrocarbons into smaller ones and requires specific conditions.
Fractional distillation is needed to separate gases like oxygen from liquefied air.
Distillation works for purifying water but not for complex separations like cracking or fractional distillation.
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