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Melting and Boiling point

A mixture of ...

Question

A mixture of He, Ne, Kr and Xe is cooled, Which one of them condenses first ?

A

Xe

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B

Ne

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C

Kr

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D

He

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Solution

The correct option is B Xe
Xe will condense first as it has the highest boiling point. The boiling points of He, Ne, Kr, and Xe are 4.4 K, 27.0 K, 121 K, and 165 K respectively.

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