Step 1: Understand the structure of chlorine molecule.
Chlorine (Cl\(_2\)) is a diatomic molecule, and the bond between two chlorine atoms is a covalent bond. In this bond, each chlorine atom shares one electron with the other chlorine atom to achieve a stable electron configuration.
Step 2: Identify the type of bond.
In chlorine molecules, two chlorine atoms share a single pair of electrons, forming a single covalent bond.
Step 3: Conclusion.
Thus, the bond present in chlorine molecules is a single covalent bond. Therefore, the correct answer is (B).