Beyond what concentration of H<sub>2</sub>S in air, acute danger to human life exists?

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Nisha Gupta

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📊 Environmental Engineering

Q. Beyond what concentration of H₂S in air, acute danger to human life exists?

(A) 50 ppm
(B) 100 ppm
(C) 300 ppm
(D) 700 ppm

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✅ Correct Answer: (D) 700 ppm

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