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While O2 is essential for aerobic life, ozone (O3) is described in the chapter as:

Question
While O2 is essential for aerobic life, ozone (O3) is described in the chapter as:
Completely harmless in all forms
A deadly poison
A source of drinking water
A type of fertiliser
Answer
A deadly poison
Detailed Explanation
The chapter explicitly states that while O2 is essential for life, ozone is a deadly poison. — Examisthan.com
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