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Listening Quiz: Tối Ưu Hóa Điều Kiện Phản Ứng – Medium Level
Th5 20, 2025
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bởi
Anna Phạm
trong
Tiếng Anh Hóa Học (English for Chemistry)
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1.
What are Michael and Laura mainly discussing?
Writing a report about past experiments
Hiring a new assistant for the lab
Testing reaction conditions to improve yield
Planning a marketing campaign for a new product
Explanation:
They discuss changing temperature and catalyst amount step by step to improve the reaction yield.
2.
At what temperature do Michael and Laura decide to start the reaction test?
50 degrees Celsius
40 degrees Celsius
70 degrees Celsius
60 degrees Celsius
Explanation:
Laura says, ‘Let’s start at 50 degrees Celsius,’ and Michael agrees.
3.
Which catalyst loadings do they plan to test?
10%, 20%, and 30%
2%, 4%, and 6%
1%, 2%, and 3%
5%, 10%, and 15%
Explanation:
Laura says they can test ‘1%, 2%, and 3% catalyst loading.’
4.
What can be inferred about their experimental approach?
They will test conditions in a controlled way and record the yield each time
They will keep the temperature fixed and only change the catalyst
They will change several factors at once and skip recording results
They already know the best settings before starting
Explanation:
They say they will change temperature and catalyst step by step and record the yield for each test, which shows a controlled approach.
5.
Why does Laura mention that too high a temperature could reduce yield?
To suggest they should avoid testing temperature entirely
To explain why the catalyst should be removed
To warn that higher temperature may not always improve the reaction
To show that they already found the best temperature
Explanation:
Laura says higher temperature ‘might’ help, but too high could reduce yield, so she is warning that increasing temperature may not always be beneficial.
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