Hello dear student,

So when the chloro ethane is reacted with silver chloride then the product which is formed is is ethyl fluoride and silver chloride. That means C2H5Cl + AgCl

I hope you understood with the way I have solve your query in case of any further doubt feel free to ask again.

Thank you

When a Chloroalkane is treated with salts like AgF, Hg3F2, CoF3 the reaction is known as Swarts reaction.

Accordin to your question,

when Choloroethane is treated with Silver fluoride we get Fluoroethane and Silver Bromide.

CH3CH2Cl + AgF ->  CH3CH2F + AgBr