Question

Nitrous oxide filled cylinder is painted in colour for hospital use.

• A. Blue
• B. Grey
• C. White
• D. Black

Hint:

Blue = Nitrous Oxide; Black/White = Oxygen.

Answer 1

The Correct Option is A

Step 1: Concept
Medical gas cylinders are color-coded to ensure quick identification and prevent administration errors in clinical settings.

Step 2: Meaning
Nitrous oxide ($N_{2}O$) is used as an inhalation anesthetic and analgesic.

Step 3: Analysis
International and national standards (such as the Indian Pharmacopoeia) specify specific colors for different gases: Oxygen is black with a white shoulder, while Nitrous Oxide is stored in blue-colored cylinders.

Step 4: Conclusion
Thus, a blue cylinder indicates the presence of Nitrous oxide.

Final Answer: (A)