Tolerable limit of nitrogen oxides in air is __________ ppm.

1.

Tolerable limit of nitrogen oxides in air is __________ ppm.

[A].	0.1
[B].	1
[C].	5
[D].	25

Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.

Leave a Comment

Chemical Engineering :: Chemical Engineering Questions and Answers : More Exercises