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Which of the following is true based on the strength of the bond?

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Which of the following is true based on the strength of the bond?

(a) Ionic > Covalent > Vanderwaal  > Hydrogen

(b) Covalent > Ionic > Vanderwaal > Hydrogen

(c) Covalent > Ionic > Hydrogen > Vanderwaal

(d) Covalent > Ionic > Hydrogen = Vanderwaal

This question was addressed to me by my college professor while I was bunking the class.

The origin of the question is Biological Molecules Structures and Functions topic in division Structures and Functions of Biological Molecules of Cell Biology

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Right choice is (b) Covalent > Ionic > Vanderwaal > Hydrogen

The explanation: Intramolecular bonds are called covalent bonds and are far stronger that intermolecular forces (or bonds). The latter are usually ranked as follows: ionic > Vanderwaal > hydrogen. Hydrogen bonding includes inter molecular interactions with permanent dipoles (and partial charges) between hydrogen atoms and a few other elements. Vander Waals interactions are based on random and instantaneous dipoles which last for fractions of a second in long, polarizable bonds.

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