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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?
Comparing different laboratory safety training programs
Choosing the best solvent for an extraction process
Deciding how to market a new chemical product
Planning a budget for new equipment
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?
Color and smell
Safety and efficiency
Cost and budget
Availability in stores
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 increases the solvent’s color intensity
It makes the solvent less polar
It lowers the need for testing
It makes solvent removal easier
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 will likely test more than one solvent before deciding
They are only interested in the cheapest solvent
They will ignore environmental concerns for now
They have already chosen ethanol as the final solvent
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 mixture of solvents
A solvent with a much higher boiling point
A solvent with no polarity
A solvent that is less safe
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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