Question

Question #2cb8f

Answer 1

Consider the size of the hydrogen bound atom: oxygen/nitrogen versus chlorine versus iodine. Because iodine is largest, there should be least overlap with the small hydrogen atom.

Explanation:

Thermodynamically, the `H-X` bond in hydrogen iodide is the weakest bond. There is better overlap between hydrogen and the smaller atoms, and, therefore, the hydrogen element bonds resist reduction.