How is xenon separated from mixture of a...

How is xenon separated from mixture of argon- krypton-xenon adsorbed on coconut charcoal by Dewar's method.

Text Solution

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Charcoal containing `Ar, Kr & Xe` is brought in contact with another charcoal maintained at `93 K or -180^(@)C`. Ar diffuses in to new charcoal.
Sample containing Kr & Xe is heated to `183K or -90^(@)C, Kr` separates.
Charcoal containing Xe is furthers heated to `273 or 1 0^(@)C Xe` separates.

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