Introduction:
In Chemistry, understanding the intermolecular forces or bonding in chemical compounds is essential for several reasons. These explanations help in explaining various physical and chemical properties of compounds, predicting their behavior, and designing new compounds with specific properties. Therefore, providing explanations for intermolecular forces in chemical compounds is not optional but rather necessary.

Importance of understanding intermolecular forces:
Understanding intermolecular forces is crucial because these forces determine the physical state, boiling and melting points, solubility, and volatility of a compound. Additionally, intermolecular forces also influence the reactivity and chemical behavior of compounds. Therefore, explaining these forces is necessary to comprehend and predict the behavior of chemical substances.

Explanations for intermolecular forces:
1. Van der Waals forces: These forces arise due to temporary fluctuations in electron distribution, resulting in the formation of temporary dipoles. Van der Waals forces include London dispersion forces, dipole-dipole interactions, and hydrogen bonding. Explaining these forces helps in understanding the strength and nature of interactions between molecules.

2. London dispersion forces: These forces occur in all molecules, even non-polar ones, and arise from temporary fluctuations in electron density. Explaining London dispersion forces helps in understanding why some substances have higher boiling and melting points due to stronger intermolecular forces.

3. Dipole-dipole interactions: These forces occur between polar molecules, where the positive end of one molecule interacts with the negative end of another molecule. Explaining dipole-dipole interactions helps in understanding the solubility of polar compounds in polar solvents and their impact on physical properties.

4. Hydrogen bonding: Hydrogen bonding is a special type of dipole-dipole interaction that occurs between hydrogen atoms bonded to highly electronegative atoms (e.g., oxygen, nitrogen, and fluorine) and lone pairs on nearby molecules. Explaining hydrogen bonding helps in understanding the unique properties of compounds with hydrogen bonds, such as higher boiling and melting points and increased solubility.

5. Ionic bonding: Ionic bonding involves the transfer of electrons from one atom to another, resulting in the formation of ions. Explaining ionic bonding helps in understanding the formation and properties of ionic compounds, such as their high melting and boiling points and their ability to conduct electricity in the molten or aqueous state.

6. Covalent bonding: Covalent bonding involves the sharing of electrons between atoms. Explaining covalent bonding helps in understanding the formation and properties of covalent compounds, such as their lower melting and boiling points compared to ionic compounds, and their ability to exist in various states (solid, liquid, or gas).

Conclusion:
Providing explanations for the intermolecular forces or bonding in chemical compounds is necessary in Chemistry. These explanations help in understanding the physical and chemical properties of compounds, their behavior, and designing new compounds with specific properties. Therefore, it is important to explain intermolecular forces to comprehend and predict the behavior of chemical substances.