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threshold-limit-value-of-copper-in-the-atmosphere-air-is

Q.

Threshold limit value of copper in the atmosphere air is

[A] 5.0 mg/m³

[B] 1.0 mg/m³

[C] 0.01 mg/m³

[D] 0.001 mg/m³

Answer & Explanation
Answer: Option [B]

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