Chemical Engineering - Environmental Engineering - Discussion

Discussion Forum : Environmental Engineering - Section 4 (Q.No. 44)
44.
A gas is termed as non-toxic, if its maximum permissible concentration (TLV) ranges from __________ ppm.
1000 to 2000
3000 to 6000
6000 to 9000
10000 to 100000
Answer: Option
Explanation:
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