Question detail
In fractional distillation, what is the role of condensation?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Carbon compounds as fuels and feedstock
Question
- A. To cool the vapors back into liquids
- B. To heat the crude oil
- C. To increase the pressure
- D. To mix different fractions
Answer
The correct option is To cool the vapors back into liquids.
Explanation
The correct option is To cool the vapors back into liquids. To cool the vapors back into liquids is correct because it directly supports the approved learning objective to explain how fractional distillation works in terms of evaporation and condensation. This belongs to Fractional distillation and petrochemicals within Carbon compounds as fuels and feedstock, so the answer must use the correct organic chemistry context. The other options are incorrect when they confuse the organic family, formula type, reaction condition, product, or property being tested. Keep molecular formula, structural formula, displayed formula, and general formula distinct. Do not confuse alkanes with alkenes, saturated with unsaturated, cracking with combustion, polymers with monomers, or hydrocarbons with oxygen-containing alcohols and carboxylic acids. When formulae are used, preserve the stored notation exactly and explain the GCSE chemistry idea in words rather than using unsupported displayed-formula diagrams.
Common mistake
Misunderstanding Fractional Distillation
Students often confuse the processes of evaporation and condensation in fractional distillation, thinking they occur simultaneously rather than in sequence.
Clarify that evaporation occurs first, where the liquid is heated and turns into vapor, followed by condensation, where the vapor cools and turns back into liquid in the fractionating column.
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