(a)
Interpretation:
The type of intermolecular forces present in ethanol and dimethyl ether has to be given.
Concept introduction:
London Dispersion forces:
London dispersion forces are weak interactions due to the temporary changes in electron density in a molecule. All covalent compound exhibits London dispersion forces. These intermolecular forces are the only intermolecular forces present in nonpolar compounds.
Hydrogen Bonding:
A
Dipole-dipole interactions:
Dipole–dipole interactions are electrostatic interactions between molecules which have permanent dipoles. This interaction is stronger than the London forces but is weaker than ion-ion interaction because only partial charges are involved positive end of a polar molecule will attract the negative end of the other molecule and influence its position
(b)
Interpretation:
The compounds with higher boiling points has to be given.
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