Explain Swarts reaction.

Explanation

Swarts reaction : The synthesis of alkyl flourides is best done by heating alkyl chloride/bromide in the presence of metallic flouride such as AgF, `Hg_2F, CdF_2` Or `SbF_5`. This reaction is known as swarts reaction. For example :
`underset("Methyl bromide")(CH3_Br) + AgBr overset("Heat")to underset("Methyl Flouride")(CH_3F) + underset("Silver Bromide")(AgBr)`