Question

Which one of the pollutant(s) mentioned above contains three atoms?

i. C6H6

ii. O3

iii. NO2

iv. NO

a) i and ii

b) ii and iii

c) iii and iv

d) ii and iv​

Answer 1

Answer:

OZONE

Explanation:

Ozone is a gas composed of three atoms of oxygen (O3). Ozone occurs both in the Earth's upper atmosphere and at ground level. Ozone can be good or bad, depending on where it is found.

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Answer 2

Option b) ii and iii contains three atoms.

• The first molecule is benzene. It contains 6 atoms of carbon and 6 atoms of hydrogen. Thus, there is a total of six atoms in benzene.
• The second molecule is ozone. It contains 3 atoms of oxygen.
• The third molecule is nitrogen dioxide. It contains 1 atom of nitrogen and 2 atoms of oxygen. Hence, it has 3 atoms in nitrogen dioxide.
• The fourth molecule is nitric oxide. It contains 1 atom of nitrogen and 1 atom of oxygen. Hence, it only has 2 atoms.
• Therefore, ozone and nitrogen dioxide have three atoms.