Question

Which of the following elements has the highest dipole moment
HF,HCN,HCl,CO

Answer 1

Answer:

i think HF has the highest dipole moment

Answer 2

Answer:

HF has the highest dipole moment.

Explanation:

HF has only 1 bond, but that bond is more polar as H and F have a bigger difference in electronegativity as compared to H and O. Also, that bond is directly in line with the dipole moment vector.

That said, it's easy to see why it's hard to predict the order. However, we have experimental data available on this topic.