Justify the following reactions are redox reactions :
`2K(s)+F_(2)(g)to2K^(+)F^(-(s)`

Explanation

`overset(0)(2K)(s)+overset(0)(F)_(2)(g)to2overset(+1)(K^+)overset(-1)(F^-)(s)`
In the reaction ,the increases in oxidation number of K `(0to1)`and the decrease in oxidation number F (0 to -1) indicate that the former undergoes oxidation and the later reduciton .Hence the given reactions is a redox reaction.