Arrange the halogens F_(2),Cl_(2),Br_(2),I_(2), in order of their increasing reactivity with alkanes.

Arrange the halogens F_(2),Cl_(2),Br_(2),I_(2), in order of their incr

1.	Arrange the halogens F_(2),Cl_(2),Br_(2),I_(2), in order of their increasing reactivity with alkanes.
Answer» `I_(2) lt Br_(2) lt Cl_(2) lt F_(2)`<BR>`Br_(2) lt Cl_(2) lt F_(2) lt I_(2)` `F_(2) lt Cl_(2) lt Br_(2) lt I_(2)` `Br_(2) lt I_(2) lt Cl_(2) lt F_(2)` Solution :Rate of reaction of alkanes with halogens is `F_(2) gt Cl_(2) gt Br_(2) gt I_(2)`. Reactivity decreases down the group as the ELECTRONEGATIVITY of the HALOGEN decreases down the group.