Which of the following arrangements is in increasing order of reactivity of halogens between F2 Cl2 Br2 I2, I2 Br2 Cl2 F2, F2 Cl2 Br2 I2 and I2 Br2 Cl2 F2
The reactivity of halogens decreases down the group from fluorine to iodine. Therefore, the correct order of increasing reactivity of halogens is I2 < Br2 < Cl2 < F2.
So, out of the given options, the correct arrangement is:
I2 Br2 Cl2 F2 < I2 Br2 Cl2 F2 < F2 Cl2 Br2 I2.