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Listening Quiz: Đánh Giá Khả Năng Phân Hủy Sinh Học Của Chất Hoạt Động Bề Mặt Mới – Advanced Level
Th3 4, 2024
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bởi
Anna Phạm
trong
Tiếng Anh Hóa Học (English for Chemistry)
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1.
Which test does Daniel say is required first for the new surfactant?
An inherent biodegradability test
A concentration stability test
A toxicity test on microbes
A ready biodegradability test
Explanation:
Daniel says, “First, a ready biodegradability test is required.”
2.
According to Daniel, which OECD test series is used for the ready biodegradability test?
OECD 401 series
OECD 201 series
OECD 301 series
OECD 501 series
Explanation:
Emma asks if it is the OECD 301 series test, and Daniel confirms, “Exactly.”
3.
What does Daniel say happens if the surfactant fails the ready biodegradability test?
The project is canceled immediately
They perform an inherent biodegradability test
They increase the surfactant concentration
They switch to measuring only oxygen
Explanation:
Daniel says, “Then we do an inherent biodegradability test.”
4.
How long does Daniel say the ready biodegradability test usually takes?
More than 60 days
14 days
About 28 days
7 days
Explanation:
Daniel states, “Ready tests take about 28 days.”
5.
Why do they use low concentrations when testing the surfactant?
To avoid toxicity to microbes
To meet the OECD 301 series requirement
To replace the need for CO2 measurement
To make the surfactant break down faster
Explanation:
Daniel says they use low concentrations “to avoid toxicity to microbes,” so that is the reason.
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Flashcards và Quiz Từ Vựng: Chỉnh Lại Rập Để Có Dáng Đẹp Hơn – Advanced Level
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Tiếng Anh Khách Sạn: Thuyết Trình Kế Hoạch Cải Thiện Chất Lượng Thực Phẩm – Easy Level
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