Q. Assertion: Amongst the halogens, fluorine can oxidise the elements to the highest oxidation state.
Reason: Due to small size of fluoride ions, it is difficult to oxidise fluoride ions to fluorine. Hence reverse reaction takes place more easily.

 2378  221 AIIMSAIIMS 1996Redox Reactions Report Error

Solution:

Due to high electronegativity and high heat of dissociation fluorine oxidise the elements to their highest oxidation state.