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What happens when concentrated sulphuric...

What happens when concentrated sulphuric acid is heated with oxalic acid ?

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Dehydration takes place OR CO and `CO_(2)` is liberated
`{:(COOH),(|),(COOH):}+"Conc. "H_(2)SO_(4)rarr CO+CO_(2)+H_(2)SO_(4).H_(2)O`
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Knowledge Check

  • Phenol, when it first reacts with concentrated sulphuric acid and then with concentrated nitric acid, gives

    A
    nitrobenzene
    B
    2,4,6-trinitrobenzene
    C
    o-Nitrophenol
    D
    P-nitrophenol

  • An important reaction of acetone is autocondensation in presence of concentrated sulphuric acid to give the aromatic compound

    A
    mesithylene
    B
    mesityl oxide
    C
    trioxan
    D
    phorone

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