List-1                                                  List-IIProperty                                                OrderA)M.P                                        1) I2F>Br>IC)Electron affinity                     3) Cl2>Br2>F2>I2D)Bond dissociation energy      4) F2>Cl2>I2>Br2                                                   5) F2

(A), (B):  The melting points and boiling points of the halogens increase going down the group . This is because, going down group  the molecules become larger. more energy is needed to overcome these forces.             Hence the order is F2 < Cl2 < Br2 < I2(C)The order of electron affinity of halogens is   Cl>F>Br>I      “F”  has lesser value of electron affinity than Cl. It is due to smaller atomic size of F.(D) Bond dissociation energy of halogen family decreases down the group as the size of atom increases.             Hence the order is   Cl2 > Br2 > F2 > I2A halogen molecule having larger atoms should have low dissociation energy and vice versa. Fluorine is an exception because of interelectronic repulsion is present in small atom fluorine.