Question

By which of the following noble gases have the maximum number of compounds been formed?

• A. He
• B. Ne
• C. Ar
• D. Xe

Hint:

Heavier noble gases (Kr, Xe) are more polarizable and thus more reactive than He/Ne/Ar.

Answer 1

The Correct Option is D

Step 1: Known noble-gas compounds.
Xenon forms many stable compounds (e.g., XeF$_2$, XeF$_4$, XeF$_6$, XeO$_3$, XeO$_4$).
Step 2: Compare others.
He, Ne are extremely inert; Ar forms very few compounds (e.g., HArF at very low temperature).
Step 3: Conclusion.
Hence, the noble gas with maximum known compounds is Xenon.