CH3-CH2-BR+SbF3 -------> gives which compound?

Dear student,

The reaction takes place as follows:

$3C{H}_3-C{H}_2-Br + Sb{F}_3 \stackrel{∆}{\to } 3C{H}_3-C{H}_2-F + SbB{r}_3$
The bromoethane or (ethyl bromide) reacts with antimony trifluoride to give fluoroethane or (ethyl fluoride) and antimony tribromide.

​​​​​​As this is a Swart's reaction in which bromo or chloro alkanes on heating with metallic fluorides like SbF₃, AgF or Hg₂F₂ gives fluoro alkanes. 

Regards