Which type of molecules show dipole-dipole interaction?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. Molecules possessing a permanent dipole.
Molecules possessing a permanent dipole show dipole-dipole interactions. These are polar molecules in which there is a permanent separation of positive and negative charges due to unequal sharing of electrons between atoms with different electronegativities. The positive end of one molecule attracts the negative end of another, creating an intermolecular force. Non-polar molecules or molecules with only transient dipoles exhibit weaker London dispersion forces, while ionic molecules interact through much stronger electrostatic forces, not typical dipole-dipole interactions.