Which pair of molecules has the strongest dipole–dipole interaction?
A
NH3 and NH3
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B
CH4 and CH4
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C
CO2 and CO2
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D
NH3 and CH4
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Solution
The correct option is ANH3 and NH3 NH3 molecules have the strongest dipole–dipole interactions since it is polar and intermolecular H-bonding is also present.
In CH4 and CO2, there are no dipole interactions possible, since the molecules are non-polar the net dipole moment is zero.
In CH4 and NH3, dipole-induced dipole interactions are present which is weaker than H-Bonding.