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General formula of the homologous series...

General formula of the homologous series of alkanes is `C_(n)H_(2n+2)`. Write down the molecular formula of the `8^(th)` and `12^(th)` member using this.

Text Solution

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General formula = `C_(n)H_(2n+2)`
Molecular formula of `8^(th)` member = `C_(8)H_(2xx8+2=)(C_(8)H_(18))`
Molecular formula of `12^(th)` member = `C_(12)H_(2xx12+2=)C_(12)H_(26)`
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General formula of homologous series of alkanes is C_(n)H_(2n+2) . Write down the molecular formula of the 8th and 12th member using this.

The general molecular formula for the homologous series of alkynes is C_(n)H_(2n-2) . Write down the individual molecular formulae of the first, second and third members by substituting the values 2, 3 and 4 respectively for 'n' in this formula.

Knowledge Check

  • C_(n)H_(2n)O_(2) is the general formula of

    A
    carbohydrate
    B
    fatty acid
    C
    fat
    D
    nucleic acid

  • C_(n)H_(2n+2)O is the general formula for

    A
    monohydric alcohols
    B
    epoxides
    C
    aldehydes and alkoxyalkanes
    D
    aldehydes and ketones

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    The general molecular formula for the homologous series of alkynes is C_(n)H_(2n-2) . Write down the individual molecular formulae of the value 2, 3 and 4 respectively for 'n' in this formula.

    The general molecular formula for the homologous series of alkynes is C_(n)H_(2n-2) . Write down the individual molecular formulae of the value 2, 3 and 4 respectively for 'n' in this formula.

    (a) Give the general name of the calss of compounds having the general formula C_(n)H_(2n-2) .Write name iof the first member of this homologous series. (b) The general formula of a homologous series of carbon compounds is C_(n)H_(2n) . Write the molecualr formulae of the second and fourth memebers of the series . (c ) Write the molecular formulae of the third and fifth memebers of hmo,ogous series of carbon compounds represented by the general formula C_(n)H_(2n+2)

    (a) Define a homologous series . Give the name and structureal formula of one homologue of the of the following: CH_(3)OH (b) Write the molecular formiula of the third member of the homologous series of carbon compounds with general formula C_(n)H_(2n+1)OH . (c ) Name any two fossil fuels.

    Write the name and molecular formula of the fourth member of alkane series.

    Write the name and molecular formula of the fourth member of alkane series.

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