The polarity of a bond is determined by the difference in electronegativity between the two atoms. Electronegativity is the ability of an atom to attract electrons towards itself. The greater the difference in electronegativity, the more polar the bond will be.

In the case of As Cl and F, the electronegativity of As is 2.18, while the electronegativity of Cl is 3.00. The difference in electronegativity between As and Cl is 0.82, while the difference in electronegativity between As and F is 1.87.

Therefore, the bond between As and F will be more polar than the bond between As and Cl.