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Listening Quiz: Lựa Chọn Dung Môi Phù Hợp Cho Quá Trình Chiết Xuất – Advanced Level
Th1 11, 2025
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bởi
Anna Phạm
trong
Tiếng Anh Hóa Học (English for Chemistry)
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1.
What is the main topic of the conversation?
Deciding how to market a new chemical product
Choosing the best solvent for an extraction process
Planning a budget for new equipment
Comparing different laboratory safety training programs
Explanation:
Robert and Linda discuss how to choose a solvent for a new extraction process, focusing on factors like polarity, safety, boiling point, cost, and environmental impact.
2.
Which factor do Robert and Linda say should come first when choosing a solvent?
Cost and budget
Color and smell
Availability in stores
Safety and efficiency
Explanation:
Robert says that cost is important, but safety and efficiency come first.
3.
Why does Robert say a lower boiling point is useful?
It makes solvent removal easier
It makes the solvent less polar
It increases the solvent’s color intensity
It lowers the need for testing
Explanation:
Robert explains that a lower boiling point makes solvent removal easier.
4.
What can be inferred about the team’s decision on a solvent?
They have already chosen ethanol as the final solvent
They will ignore environmental concerns for now
They are only interested in the cheapest solvent
They will likely test more than one solvent before deciding
Explanation:
Linda says they should run some tests with different solvents next week, and Robert says data will help them choose the best solvent, so they will likely test multiple solvents before deciding.
5.
What does Linda suggest might work better than using ethanol alone?
A solvent that is less safe
A solvent with a much higher boiling point
A solvent with no polarity
A mixture of solvents
Explanation:
Linda says, ‘Maybe a mixture of solvents will work better,’ and Robert agrees it could balance polarity and improve extraction.
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