Which of the following pair of compounds exhibit tautomerisim?

1.	Which of the following pair of compounds exhibit tautomerisim?
Answer» ETHANAL and vinyl alcohol Methyl propyl ether and diethyl ether Neo-pentane and n-pentane Propanal and propanone Solution :`{:("Ethanal",,"Vinyl alcohol"),(OVERSET(alpha)(C)H_(3)CHO,,CH_(2)=CHOH),(underset(alpha)(H)_(3)C - overset(overset(O)(\|\|))(C )-H,hArr,H_(2)C=overset(overset(OH)(\|))(C )-H),("Keto form",,"Enol form"):}` Ethanal has `alpha`-hydrogen to CARBONYL group and it has tautomer vinyl alcohol. (B) , (C ), (D) do not have `alpha`-hydrogen to carbonyl group and their enol from

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