Question

Carbondioxide is used in:

• A. fire extinguishers
• B. photosynthesis
• C. both $A$ and $B$
• D. none of these

Answer 1

The correct option is C both $A$ and $B$

Option $\left(C\right)$ is correct.

Carbon dioxide is used in both fire extinguishers and photosynthesis.

Carbon dioxide is used in fire extinguishers as a desirable alternative to water for most fires. It is non-flammable and displaces air , hence the oxygen in air required for combustion. It’s also cold when it emerges from the extinguisher. It is useful for electrical fires, particularly on electronic equipment since it is non-conducting and safe to use.

Plants and some microbes use $C{O}_2$ for photosynthesis to make food by using up carbon dioxide. These organisms combine carbon dioxide and water to produce carbohydrates while giving off oxygen.

$C{O}_2$ is also a constituent of medical gases as it promotes exhalation. It is also used in carbonated drinks.