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Although aldehydes are easily oxidisable...

Although aldehydes are easily oxidisable, propanal can conveniently be prepared by oxidation of propanol by acidified potassium dichromate. Why ?

Text Solution

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Aldehydes can be obtained in quantitative yield by the oxidation of primary alcohols provided these are removed from the reaction mixture as soon as they are formed to prevent their further oxidation to carboxylic acids.
Since alehydes having boilng points less than 373K (b.p. of `H_(2)O`) can be easily removed by distillation, therefore, propanal (b.p. 323K) can be easily prepared from propanonl-1 by distilling it from the alcohol-acid dichromate solution.
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Aldehydes are easily oxidisable yet propanal can conveniently br prepared by the oxidation of propanol by acid K_(2)Cr_(2)O_(7) .

Which type of organic compound is most resistant oxidation by acidified potassium dichromate?

Knowledge Check

  • When methyl alcohol is oxidised with acidified potassium dichromate , it forms

    A
    Formic acid
    B
    Formaldehyde
    C
    Methane
    D
    Acetaldehyde

  • Acidified potassium permangate can't oxidize

    A
    `C_(2)O_(4)^(2-)`
    B
    `N_(2)H_(4)`
    C
    `SO_(4)^(2-)`
    D
    `S_(2)O_(3)^(2-)`

  • The oxidation state of chromium in the final product formed by the reaction between KI and acidified potassium dichromate solution is

    A
    `+3`
    B
    `+2`
    C
    `+6`
    D
    `+4`

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    Under what circumstances may and aldehyde ber prepared by oxidation of primary alcohol, ROH, with acid dichromate?

    The oxidation state of chromium in the final product formed by the reaction between Kl and acidified potassium dichromate solution is :

    The oxidation state of chromium in the final product formed by the reaction between KI and acidified potassium dichromate solution is

    The oxidation state of chromium in the final product formed by the reaction between KI and acidified potassium dichromate solution is

    The oxidation state of chromium in the final product formed by the reaction between Kl and acidified potassium dichromate solution is:

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