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Listening Quiz: Thảo Luận Độ Tinh Khiết Hợp Chất Trước Khi Thử Nghiệm – Advanced Level
Th7 11, 2025
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bởi
Anna Phạm
trong
Tiếng Anh Hóa Học (English for Chemistry)
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1.
What purity percentage did Michael report for the new compound?
99.8 percent
97.8 percent
98.7 percent
95.8 percent
Explanation:
Michael said the compound’s purity was 97.8 percent.
2.
What did Michael say about the impurities in the spectrum?
They made the compound unstable
There were minor peaks below 1 percent
There were none at all
They were above 5 percent
Explanation:
Michael explained that there were minor peaks, but they were below 1 percent.
3.
Why does Linda want the purity documented in the report?
To avoid repeating the HPLC analysis
To prove the compound was synthesized correctly
To include the result before biological testing
To compare it with older compounds
Explanation:
Linda says the purity should be documented in the report before they proceed with the tests.
4.
What can be inferred about the compound after Michael’s checks?
It is too unstable for any testing
It has a purity below acceptable levels
It appears suitable for biological testing
It must be retested immediately
Explanation:
Linda says the purity should be acceptable for biological testing, and Michael also reports that the compound is stable for at least 48 hours.
5.
What will Michael do next?
Rewrite the report with Linda
Wait for new compound samples
Repeat the purity test tomorrow
Start the biological testing
Explanation:
After Linda says no need to repeat the test unless results change, Michael says, ‘I will start the biological testing then.’
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