AP BIOLOGY

BIOCHEMISTRY

POLAR AND NONPOLAR MOLECULES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which is the second strongest intermolecular force, after hydrogen bonding?
A
dipole-dipole attraction
B
London forces
Explanation: 

Detailed explanation-1: -In order from strongest to weakest, the intermolecular forces given in the answer choices are: ion-dipole, hydrogen bonding, dipole-dipole, and Van der Waals forces.

Detailed explanation-2: -Dipole-Dipole Interactions Strength: The second strongest intermolecular force. This happens because a temporary instantaneous dipole can happen in a molecule as electrons move around.

Detailed explanation-3: -With such a high difference in the electrostatic behaviour and such strong polarity, the bonding becomes extra strong and thus Hydrogen bonding is stronger than dipole-dipole interactions.

Detailed explanation-4: -The order for the arrangement of intermolecular forces of attraction can be: Ionic bonds > Hydrogen bonding > Van der Waals dipole-dipole interactions > Van der Waals dispersion forces. The strongest of all amongst intermolecular forces is ionic bond.

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