TS EAMCET · Chemistry · p Block Elements (Group 15, 16, 17 & 18)
In the Dewar's method of separation of noble gases, the mixture of noble gases is kept in contact with coconut charcoal at \(173 \mathrm{~K}\) which one of the following gaseous mixtures is not adsorbed on to the charcoal?
- A \(\mathrm{Ar}, \mathrm{Kr}\)
- B \(\mathrm{Xe}, \mathrm{Ar}\)
- C \(\mathrm{He}, \mathrm{Ne}\)
- D \(\mathrm{Xe}, \mathrm{Kr}\)
Answer & Solution
Correct Answer
(C) \(\mathrm{He}, \mathrm{Ne}\)
Step-by-step Solution
Detailed explanation
Only \(\mathrm{He}\) and \(\mathrm{Ne}\) are remained unadsorbed on the coconut charcoal at \(-100^{\circ} \mathrm{C}(173 \mathrm{~K})\) as their boiling points are less than \(-100^{\circ} \mathrm{C} .(\mathrm{He}=4 \mathrm{~K}, \mathrm{Ne}=27 \mathrm{~K})\)
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