Question

TLV of ozone (O₃) and phosgene (COCl₂) in air is __________ ppm.

a.

0.1

b.

25

c.

100

d.

1000

Answer: (a).0.1

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Q. TLV of ozone (O₃) and phosgene (COCl₂) in air is __________ ppm.

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