Question

Which among the following gases is used in treatment of cancer?

• A. He
• B. Ar
• C. Ne
• D. Rn

Hint:

Radon is the only naturally radioactive noble gas and finds application in radiotherapy.

Answer 1

The Correct Option is D

Step 1: Understand medical use of noble gases.
Some radioactive gases are used in medical therapy due to their ability to emit ionizing radiation that can destroy cancer cells.

Step 2: Identify the radioactive noble gas.
Radon (\(\mathrm{Rn}\)) is a radioactive noble gas that emits alpha particles. These radiations are used in radiotherapy for cancer treatment.

Step 3: Analyse other options.
He, Ar, Ne are inert and non-radioactive, hence not used in cancer treatment.

Step 4: Conclusion.
Radon is used in the treatment of cancer.