Which bond is more polar P-F or P-Cl ?

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Explanation: 

Because flourine is above chlorine in the periodic table,we would predict it to be more electronegative.Consequently,the P-F bond bond will be more polar than the P-Cl bond . You should compare the electronegativity differences for the two bonds to verify prediction.The flourine atom carries the aprtial negative charge .

Answer: 

P-F bond will be more electronegativity then P-Cl because F is more electronegtive then Cl .