Answer
$Cl_{2}(g) + F_{2}(g) → 2ClF(g)$
$Cl_{2}(g) + 3F_{2}(g) → 2ClF_3(g)$
$Cl_{2}(g) +5 F_{2}(g) → 2ClF_5(g)$
Work Step by Step
Chlorine gas reacts with fluorine gas at 225 degree Celsius to form chlorine monofluoride and chlorine trifluoride. However at this stage all of the fluorine has not reacted. At higher temperatures, the remaining fluorine reacts to form chlorine pentafluoride.