Which has lowest solubility in water?

  • Option 1)

    CH_{3}CH_{2}CH_{2}CH_{2}OH

  • Option 2)

     

                    CH_{3}

                      |

    CH_{3}-CH-CH_{2}OH

  • Option 3)

    HOH_{2}C-CH_{3}

  • Option 4)

    C_{6}\: H_{5}\: CH_{2}\: CH_{2}OH

 

Answers (1)

As we learnt in

Physical properties of alcohol -

–  Lower alcohols are colourless liquids but higher alcohols are colourless waxy solids.

–  Increase in boiling point with increase in number of carbon atoms.

–  Boiling point decrease with increase of branching in carbon atom.

–  Solubility decreases with increase in the size of alkyl groups.

-

 

 C_{6}H_{5}CH_{2}CH_{2}OH  is least soluble due to its size


Option 1)

CH_{3}CH_{2}CH_{2}CH_{2}OH

Option is incorrect

Option 2)

 

                CH_{3}

                  |

CH_{3}-CH-CH_{2}OH

Option is incorrect

Option 3)

HOH_{2}C-CH_{3}

Option is incorrect

Option 4)

C_{6}\: H_{5}\: CH_{2}\: CH_{2}OH

Option is correct

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