The gas used in fire extinguishers is

Correct option is C

Ans. (c)
Sol. Carbon dioxide (CO₂) is commonly used in fire extinguishers, especially for electrical and flammable liquid fires. CO₂ is non-flammable and displaces oxygen, thereby suffocating the fire. It also does not leave any residue, making it suitable for use in offices, labs, and electrical equipment areas.
Explanation of each option:
· (a) Nitrogen – Inert gas, but not used in fire extinguishers for suppressing fire.
· (b) Sulphur dioxide – Toxic gas, not suitable for fire extinguishing.
· (c) Carbon dioxide – ✅ Correct. Commonly used in fire extinguishers to displace oxygen.
· (d) Hydrogen – Highly flammable gas, not used in fire extinguishers.