Question

What are the two forms of oxygen found in the atmosphere?

• A. Molecular oxygen $\left(O_2\right)$
• B. Ozone $\left(O_3\right)$
• C. CFC
• D. Monoxide

Answer 1

Answer: (A), (B)

The correct options are
A Molecular oxygen $\left(O_2\right)$
B Ozone $\left(O_3\right)$

The two forms of oxygen found in the atmosphere are:

i) Molecular oxygen $\left(O_2\right)$
Molecular oxygen is a diatomic molecule that is composed of two oxygen atoms held together by a covalent bond.

ii) Ozone $\left(O_3\right)$
Ozone, or trioxygen, is an inorganic molecule with the chemical formula $\left(O_3\right)$. It is a pale blue gas with a distinctively pungent smell.