Which of the following is a common use of carbon dioxide ?
As a fuel in combustion reactions.
As a refrigerant in cooling systems.
As a fertilizer for plants.
As a solvent for organic compounds.
The correct answer is (2) As a refrigerant in cooling systems. Carbon dioxide is commonly used as a refrigerant in cooling systems due to its low toxicity and non-flammability. Hence option 2 is the correct answer.
Option (1) is incorrect because is not a fuel and does not participate in combustion reactions. Hence option 1 is incorrect.
Option (3) is incorrect because while can be used as a source of carbon for plants, it is not a fertilizer. Hence option 3 is incorrect.
Option (4) is incorrect because is not a solvent for organic compounds. Hence option 4 is incorrect.