One Question per Day ---------- Multiple-choice Questions on Basic Process Knowledge (October 16)
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Participation earns a wealth reward of 3. Multiple-choice question: In distillation, the introduction of reflux allows for mass transfer between the descending liquid phase and the ascending vapor phase, thereby increasing the concentration of volatile components in the ascending vapor phase. Which statement is the most appropriate? A The volatile components in the liquid phase enter the vapor phase ； B The poorly volatile components in the vapor phase enter the liquid phase ； In liquid phase C, both volatile and non-volatile components enter the vapor phase, but there are more volatile components among them ； In liquid D, the evaporation of volatile components into the vapor phase and the absorption of non-volatile components from the vapor phase into the liquid phase must occur simultaneously.
In liquid D, the evaporation of volatile components into the vapor phase and the absorption of non-volatile components from the vapor phase into the liquid phase must occur simultaneously.