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Question
The two forms of oxygen found in the atmosphere are
Options
water and ozone
water and oxygen
ozone and oxygen
water and carbon-dioxide
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Solution
ozone and oxygen
Explanation:
Oxygen is found in the atmosphere in two forms, as diatomic molecule (O2) and as triatomic ozone (O3). Normally elemental oxygen is found in the form of a diatomic molecule in the atmosphere. Ozone is not stable near the earth’s surface and is present 18¬50 km above in the atmosphere (stratosphere) as a thick blanket called ozonosphere or ozone shield.
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