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Arrange the following in the increasing ...

Arrange the following in the increasing order of their boiling point and give a reason for your ordering : `"Propan -1-ol, propan - 1, 2, 3 - triol, propan -1, 3 - diol, propan - 2- ol"`

Text Solution

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`2^(@)` alcohols have lower boiling points than `1^(@)-` alcohols due to a corresponding decrease in the extent of H - bonding because of steric hindrance. Therefore Propan -1 ol has higher boiling point than Propan -2- ol. Hydrogen group increases, boiling point also increases.
`therefore" Overall increasing order of boiling points is,"`
`"propan -2- ol" lt " Propan -1- ol" lt " propan 1,3 - diol" lt "propan -1, 2, 3- triol"`
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Knowledge Check

  • Arrange the following compounds in invreasing order of boiling point : I-propan-1-ol II-butan-1-ol III butan-2-ol IV- pentan-1-ol

    A
    `I,III,II,IV`
    B
    `I,II,III,IV`
    C
    `IV,III,II,I`
    D
    `IV,II,III,I`

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