Final answer:
c) Single covalent bond
The weakest bond among the options given is the single covalent bond because it involves the sharing of one pair of electrons between two atoms, which is less than what is shared in double and triple covalent bonds.
Step-by-step explanation:
The question asks to identify the weakest bond among a double covalent bond, a triple covalent bond, and a single covalent bond. Based on bond strengths, the correct answer is c) Single covalent bond. In a single covalent bond, there is one pair of electrons shared between two atoms. When comparing single, double, and triple covalent bonds, the single covalent bond has the least amount of shared electron pairs, therefore it is generally the weakest. In contrast, double covalent bonds have two pairs of shared electrons, making them stronger, and triple covalent bonds have three pairs of shared electrons, making them the strongest of the three bond types.