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Chemistry Question 67 – NEET-UG 2023

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Intermolecular forces are forces of attraction and repulsion between interacting particles that will include : A. dipole - dipole forces. B. dipole - induced dipole forces. C. hydrogen bonding. D. covalent bonding. E. dispersion forces. Choose the most appropriate answer from the options given below :

Intermolecular forces are attractive or repulsive forces that act between neighboring molecules, atoms, or ions. They are distinct from intramolecular forces, which are the forces holding atoms together within a molecule.

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Ninja Strategy•Identify Intramolecular Force

Quickly identify 'covalent bonding' as an intramolecular force, then eliminate all options that incorrectly include it.

Step 1: Define Intermolecular Forces✦ Active

Intermolecular forces (IMFs) are attractive forces that exist between molecules. They are generally weaker than intramolecular forces, which are the forces holding atoms together within a single molecule (e.g., covalent or ionic bonds).

Step 2: Classify the Given Forces○ Expand

Let's classify each force listed: A. Dipole-dipole forces: These are attractive forces between polar molecules. (Intermolecular) B. Dipole-induced dipole forces: These occur between a polar molecule and a nonpolar molecule. (Intermolecular) C. Hydrogen bonding: A special, strong type of dipole-dipole interaction. (Intermolecular) D. Covalent bonding: This is a strong force holding atoms together *within* a molecule. (Intramolecular) E. Dispersion forces (London dispersion forces): These are temporary attractive forces present in all molecules. (Intermolecular)

💡 Teacher's Secret Hint

Remember that intramolecular forces are much stronger than intermolecular forces.

Step 3: Select the Correct Combination○ Expand

Based on the classification, A, B, C, and E are intermolecular forces. Covalent bonding (D) is an intramolecular force. Therefore, the option that includes A, B, C, and E as correct is the most appropriate answer.

💡 Teacher's Secret Hint

The key is to correctly identify covalent bonding as an intramolecular force, which helps eliminate incorrect options.

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