When $I_2$ is passed through $KCl$,$KF$,and $KBr$ solutions,what happens?

Assertion : The fluorine has lower reactivity.
Reason : $F-F$ bond has low bond dissociation energy.

Which of the given methods cannot produce $Cl_2$?

Why is $ICl$ more reactive than $I_2$?

The correct order of reactivity of halogens is

The colour of the $X_2$ molecules of group $17$ elements changes gradually from yellow to violet down the group. This is due to
[$A$] the physical state of $X_2$ at room temperature changes from gas to solid down the group
[$B$] decrease in $HOMO-LUMO$ gap down the group
[$C$] decrease in $\pi^*-\sigma^*$ gap down the group
[$D$] decrease in ionization energy down the group