Which gas is used in fluorescent tubes?

Practice MCQ for SSC, UPSC, RRB Exams

A. Neon A.
B. Argon B.
C. Krypton C.
D. Xenon D.

Correct Answer: B সঠিক উত্তর: B

Explanation ব্যাখ্যা

Fluorescent tubes use a combination of gases, primarily argon and a small amount of mercury vapor. The argon helps initiate the electrical discharge and improve the tube's efficiency and longevity, while the mercury vapor emits ultraviolet light, which then interacts with the phosphor coating to produce visible light.

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