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Question

Which of the following statement is correct regarding dipole-dipole force?

A
The molecules should have hydrogen
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B
The molecules should have carbon
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C
Dipole-dipole force exists in every molecule
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D
The molecules need to be very close to each other
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Solution

The correct option is D The molecules need to be very close to each other
Dipole-dipole interactions occur when the partial charges formed within one molecule are attracted to an opposite partial charge when the molecules are closer to each other.
Polar molecules align themselves so that the positive end of one molecule interacts with the negative end of another molecule.
For dipole-dipole interactions presence of carbon or hydrogen atom is not neccessary. It can occur in the absence of these molecules also.

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