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at-what-concentration-can-the-taste-and-smell-of-sulphur-dioxide-be-detected
Question
At what concentration can the taste and smell of sulphur dioxide be detected?
[A] 1000-2000ppm
[B] 11-30ppm
[C] 500-700ppm
[D] 0.1-0.3ppm
Answer & Explanation
Answer: 0.1-0.3ppm
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