Interpretation:
Intermolecular forces must be compared and contrasted. Intramolecular forces must be described.
Concept introduction:
Intermolecular forces are active among different molecules and intramolecular force is active within a single molecule.

Answer to Problem 15SSC
Intermolecular forces are hydrogen bonding, ion-dipole interaction and van der Waals force. Among all these van der Waals force is weakest and ionic bonding is strongest.
Intramolecular force is the force which holds together atoms in a molecule.
Explanation of Solution
Ionic bonding is the strongest as in this case there is electrostatic interaction between oppositely charged ions.
Hydrogen bonding is generated due to polarization of a bond in which an electronegative small atom is bonded with hydrogen.
Van der Waals force depends on surface area of the molecule. It is very weak force.
In ion-dipole interaction a dipole with two opposite pole is interacted with an ion either cation or anion.
Intramolecular forces are ionic bonding, covalent bonding, co-ordinate covalent boning and metallic bonding. These are active in a molecule to hold all the constituent atoms of the single molecule.
Intermolecular forces are present among different molecules unlike intramolecular forces which are active in a single molecule.
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