What is the ranking order of the degree of polarity? Of HF, HCI, HBr and HI

The ranking order of the degree of polarity is HF>HCl>HBr>HI

Explanation:

The degree of polarity of a compound depends on the nature electronegative atom that it contains.

Among Fluorine, chlorine, bromine and iodine the electronegativity of fluorine is highest among all the mentioned atoms.

Due to high electronegativity HF is the most polar than HCl, HBr and HI and the HI have least polarity as its atomic structure is large and electronegativity is lower than fluorine, chlorine and bromine.