Why is a C-O bond more polar than a F-O bond?
There is a greater difference in electronegativity between the C-O bond than the F-O bond.
The bond between Carbon and Oxygen has a difference of 1.0 in electro negativity.
Oxygen is 3.5-3.6
Carbon is 2.6
Fluorine is 4.0
Oxygen is 3.6
Note in the C-O the Oxygen is the oxidizer and becomes negative in charge.
Note in the F-O the Oxygen is the reducers and becomes positive in charge.