The relative strength of interionic/intermolecular forces in decreasing order is :
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- dipole-dipole \( > \) ion-dipole \( > \) ion-ion
- ion-dipole \( > \) dipole-dipole \( > \) ion-ion
- ion-dipole \( > \) ion-ion \( > \) dipole-dipole
- ion-ion \( > \) ion-dipole \( > \) dipole-dipole
The Correct Option is D
Solution and Explanation
Ion-dipole forces involve a full charge and a partial charge and are weaker than ion-ion (fall off as 1/r2).
Dipole-dipole forces involve only partial charges and are the weakest of the three (1/r3).
Order: ion-ion \(\gt\) ion-dipole \(\gt\) dipole-dipole.
Answer: (D) ion-ion \(\gt\) ion-dipole \(\gt\) dipole-dipole
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