Concept: This question compares the strength of a covalent bond with that of a hydrogen bond. Covalent bonds are intramolecular forces, while hydrogen bonds are intermolecular forces.

Why (A) is correct: Covalent bonds are strong chemical bonds formed by the sharing of electrons between atoms. The bond energy of a typical covalent bond, such as the O-H bond in water, is significantly high, usually in the range of 300-500 kJ/mol. Hydrogen bonds, on the other hand, are much weaker intermolecular forces, typically having bond energies in the range of 10-40 kJ/mol. Therefore, the bond energy of a covalent O-H bond is much greater than that of a hydrogen bond.

Option Analysis:

• A) Greater than bond energy of hydrogen bond: This is correct. Covalent bonds are strong intramolecular forces, while hydrogen bonds are weak intermolecular forces.
• B) Equal to bond energy of hydrogen bond: This is incorrect. Their energy magnitudes are vastly different.
• C) Less than bond energy of hydrogen bond: This is incorrect. Covalent bonds are much stronger.
• D) Half of the bond energy of hydrogen bond: This is incorrect. The covalent bond is much stronger, not weaker.

Correct Answer: (A)