JEE Main 2017 — Alcohols Phenols And Ethers Question with Solution
From: JEE Main 2017 (Online) 9th April Morning Slot
Question
The increasing order of the boiling points for the following compounds is :
This question includes a diagram. The text above accompanies the figure.
Choose an option
Show full solutionCorrect option: A
Correct answer
A(III) < (IV) < (II) < (I)
Step-by-step explanation
B.P. dipole moment
(I) C2H5OH : Hydrogen bonding - Hydrogen bonding > Dipole-Dipole
(II) C2H5Cl : Dipole-Dipole of C2H5Cl is more polar than C2H5OCH3
so, Dipole-Dipole C2H5Cl > Dipole-Dipole C2H5OCH3
(III) C2H5CH3 : No hydrogen bonding and dipole-dipole interaction
(IV) C2H5OCH3 : Dipole-Dipole
The increasing order of boiling points will be :
C2H5CH3 < C2H5OCH3 < C2H5Cl < C2H5OH
(I) C2H5OH : Hydrogen bonding - Hydrogen bonding > Dipole-Dipole
(II) C2H5Cl : Dipole-Dipole of C2H5Cl is more polar than C2H5OCH3
so, Dipole-Dipole C2H5Cl > Dipole-Dipole C2H5OCH3
(III) C2H5CH3 : No hydrogen bonding and dipole-dipole interaction
(IV) C2H5OCH3 : Dipole-Dipole
The increasing order of boiling points will be :
C2H5CH3 < C2H5OCH3 < C2H5Cl < C2H5OH
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