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Question

Which one has the highest boiling point?

A
He
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B
Ne
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C
Kr
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D
Xe
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Solution

The correct option is D Xe
As we move down the group of noble gases, molecular mass increases by which dipole produced for a moment and hence London forces increases from He to Xe. Therefore, more amount of energy is required to break these forces, thus boiling point also increases from He and Xe.

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