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Which of the following noble gases is not obtained via fractional distillation?(a) Krypton(b) Argon(c) Neon(d) HeliumThis question was posed to me in an interview.My query is from P-Block in section P-Block Elements of Chemistry – Class 12

Answer»

The correct ANSWER is (d) Helium

The best explanation: Neon, argon, krypton and xenon are obtained by fractional distillation of air. Fractional distillation of liquid air gives oxygen, nitrogen and a MIXTURE of noble GASES. The individual noble gases are then separated by adsorption over coconut CHARCOAL which adsorbs DIFFERENT gases at different temperatures.



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