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Question

Which of the following bonds/forces is the weakest?

A
Covalent bond
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B
Ionic bond
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C
Hydrogen bond
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D
London force
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Solution

The correct option is D London force
Order of strength of weak forces:
Ion-dipole > Dipole-dipole > Ion-induced dipole > Dipole-induced dipole > London force
Ionic bonds and covalent bonds are strong while hydrogen bonds and London forces are weak. London forces are weaker than hydrogen bonds since london forces involve only instantaneous dipoles.
That's why they are the weakest of all the bonds/forces given.

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