Answer :
The predominant intermolecular force between Ethane is dispersion forces.
The Ethane molecule has the formula CH₃CH₃.
Usually the strongest intermolecular force is hydrogen bonding but in the case of Ethane molecule the strongest intermolecular force is dispersion forces.
The dispersion forces also known as London dispersion forces is the weakest intermolecular force this is the force that is a temporary attractive force which results when the polarization occurs between the atoms of the molecule.
This same intermolecular force is observed in the molecule of Ethane.
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