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Write the tautomerism in sulphurous acid...

Write the tautomerism in sulphurous acid.

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Sulphurous acid has two tautomeric forms.
`{:(" "H),(" "|) , (O=S - OH to HO - S =O), (" "|" "||),( (I) " "OH" ""O ""(II)):}`
Structure I s prefered as the suplhite `(SO _(3) ^(2-))` salts are familier foe sulphours acid.
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