Question 5 of 30
What are the characteristics of Carbon Dioxide (CO2)?
A
It is lighter than oxygen
B
It is heavier than oxygen
C
It supports combustion
D
It is bright green in color
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Answer & Explanation
The correct answer is Option B: It is heavier than oxygen.
Carbon dioxide (CO2) is a colorless, odorless gas that is heavier than air (and oxygen). It suppresses fire by displacing oxygen in the environment, effectively smothering the fire.