A, B, C and D are the elements belonging to 17th group of Modern periodic table. The correct trend of Ionization enthalpy of their ions is A- > B- > C- > D-. The element ‘C’ in the sequence is
Atomic radius….F<Cl<Br<I;
Density ….F<Cl<Br<I;
IP ….F>Cl>Br>I;
EN ….F>Cl>Br>I;
Electron gain enthalpy ….I<Br<F<Cl; Due to small size and inter electronic repulsions in Fluorine ;
IP …..I-<Br-<F-<Cl-;
IP trend….F>Cl>Br>I>Cl->F->Br->I-
B.D.E….Cl2>Br2>F2>I2; Due to small size and repulsions between lone pairs on adjacent Fluorine atoms ;
IP …..I-<Br-<F-<Cl-;
Reactivity and oxidizing power…..F2>Cl2>Br2>I2;
Hydration enthalpy…F->Cl->Br->I-;
MP and BP ….F2<Cl2<Br2<I2; Due to increased strength of London dispersion forces;