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Which one has the highest boiling point? (1) He (2) Ne (3) Kr (4) Xe

1. He
2. Ne
3. Kr
4. Xe

Correct answer: Xe

Solution

Xenon (Xe) has the highest boiling point among the given noble gases due to its larger atomic size and greater van der Waals forces, which result from increased electron cloud size and polarizability.

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