Alkyl halides on reduction with zinc and dilute HCL acid give alkanes but why except fluorides?

Alkyl halides on reduction with zinc and dilute HCL acid give alkanes

1.	Alkyl halides on reduction with zinc and dilute HCL acid give alkanes but why except fluorides?
Answer» Because when flourine is combined to any of alkyl group then C-F bond is very strong ( flourine is most electronegative element) so it cant be broken by reduction...