Which among the following is correct decreasing order of covalent character of ionic bond?
Which among the following is correct decreasing order of covalent character of ionic bond?
NaCl > MgCl2 > AlCl3
AlCl3 > NaCl > MgCl2
AlCl3 > MgCl2 > NaCl
MgCl2 > NaCl > AlCl3
The Correct Option is C
Solution and Explanation
The covalent character in an ionic bond is determined by the difference in electronegativity between the atoms involved. When the electronegativity difference is small, the ionic bond tends to have more covalent character.
In the given options, aluminum chloride (AlCl3) has the highest covalent character because aluminum (Al) and chlorine (Cl) have a relatively small electronegativity difference. Magnesium chloride (MgCl2) has a slightly higher electronegativity difference than AlCl3, but still less than sodium chloride (NaCl).
Therefore, the decreasing order of covalent character is AlCl3 > MgCl2 > NaCl.
Option (C) AlCl3 > MgCl2 > NaCl represents the correct decreasing order of covalent character of the ionic bond among the provided options.
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Concepts Used:
Chemical Bonding and Molecular Structure
Such a group of atoms is called a molecule. Obviously, there must be some force that holds these constituent atoms together in the molecules. The attractive force which holds various constituents (atoms, ions, etc.) together in different chemical species is called a chemical bond.
Types of Chemical Bonds:
There are 4 types of chemical bonds which are formed by atoms or molecules to yield compounds.
- Ionic Bonds - Ionic bonding is a type of chemical bonding which involves a transfer of electrons from one atom or molecule to another.
- Covalent Bonds - Compounds that contain carbon commonly exhibit this type of chemical bonding.
- Hydrogen Bonds - It is a type of polar covalent bonding between oxygen and hydrogen wherein the hydrogen develops a partial positive charge
- Polar Bonds - In Polar Covalent chemical bonding, electrons are shared unequally since the more electronegative atom pulls the electron pair closer to itself and away from the less electronegative atom.
Factors Affecting Bond Enthalpy in Chemical Bonding:
- Size of the Atom
- Multiplicity of Bonds
- Number of Lone Pair of Electrons Present
- Bond Angle