Question

The weakest among the following types of bond is

• A. ionic
• B. covalent
• C. metallic
• D. H-bond

Answer 1

The Correct Option is D

To determine which type of bond is the weakest among the given options, let's briefly examine each type of bond and its characteristics:

• Ionic Bond: This type of bond forms between atoms that transfer electrons. An ionic bond typically occurs between metal and nonmetal ions, resulting in a strong electrostatic attraction. Examples include NaCl (sodium chloride).
• Covalent Bond: In covalent bonds, atoms share pairs of electrons. These bonds are generally quite strong, especially in molecules with multiple covalent bonds like diamond (carbon-carbon bonds).
• Metallic Bond: Metallic bonds occur between metal atoms, where electrons are shared in a 'sea' of electrons that facilitates high conductivity and malleability. These bonds, like those in iron or copper, are generally strong.
• Hydrogen Bond (H-bond): This is a weak interaction that occurs between a hydrogen atom covalently bonded to a highly electronegative atom (like oxygen or nitrogen) and another electronegative atom. H-bonds are significantly weaker than the other types of bonds mentioned.

Among these, the hydrogen bond (H-bond) is the weakest type of interaction. It is not a true bond like ionic, covalent, or metallic bonds but rather an intermolecular force. Despite being important for the structure and properties of substances like water and biological molecules, the energetics of hydrogen bonds are much lower, typically ranging from 1 to 3 kcal/mol (4 to 13 kJ/mol), which makes them the weakest compared to other bonds.

Thus, the correct answer is that the hydrogen bond (H-bond) is the weakest among the given options.