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Ethane can be dried by passing through c...

Ethane can be dried by passing through concentrated `H_2SO_4` but not ethylene-why ?

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Ethane being a saturated hydrocarbon does not react with concentrated `H_2SO_4`.
`CH_3-CH_3("Ethane") +Conc.H_2SO_4 to `No reaction
So, ethane can be other hand, ethylene being an unsaturated hydrocarbon when passed through concentrated `H_2SO_4` gets absorbed by the acid and forms ethyl hydrogen sulphate. So, ethylene cannot be dried by passing through concentrated `H_2SO_4`.
`underset("Ethylene")(CH_2=CH_2)+underset(("conc."))(H_2SO_4)tounderset(("Ethyl hydrogen sulphate"))(CH_3CH_2-OSO_3H)`
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