1.

The increasing order of the boiling points for the partition compounds is :underset((I))(C_(2)H_(5)OH)"" underset((II))(C_(2)H_(5)Cl) ""underset((III))(C_(2)H_(5)CH_(3))"" underset ((IV))(C_(2)H_(5)OCH_(3))

Answer»

`(III)LT(IV)lt(II)lt(I)`
`(IV)lt(III)lt(I)lt(II)`
`(II)lt(III)lt(IV)lt(I)`
`(III)lt(II)lt(I)lt(IV)`

Solution :(I) `C_(2)H_(5)OH`Hydrogen bonding Hydrogen bonding `GT` Dipole - Dipole
(II)`C_(2)H_(5)CL`Dipole - Dipole `C_(2)H_(5)Cl` is more polar than`C_(2)H_(5)OCH_(3)` so ,
Dipole - Dipole `C_(2)H_(5)Clgt` Dipole - Dipole
`C_(2)H_(5)OCH_(3)`
(III)`C_(2)H_(5)CH_(3)`No hydrogen
bonding and dipole -
dipole interaction
(IV) `C_(2)H_(5)OCH_(3)`Dipole - Dipole
Boiling POINTS order is -
`(II)lt(IV)lt(II)lt(I)`.


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