X, Y, B and P are the elements belonging to 17th group of Modern periodic table. The correct trend of oxidizing power of these elements is X2 > Y2 > B2 > P2. The element ‘B’ in the sequence is

X, Y, B and P are the elements belonging to 17th group of Modern periodic table. The correct trend of oxidizing power of these elements is X2 > Y2 > B2 > P2. The element ‘B’ in the sequence is

  1. A

    Cl

  2. B

    F

  3. C

    I

  4. D

    Br

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    Solution:

    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;

    Due to high hydration enthalpy of F- and low B.D.E of F2, F2 is the strongest oxidant and highly reactive;

    SRP Values of E12F2/F-0+2.87 V > E12Cl2/Cl-0+1.36 V > E12Br2/Br-0+1.08 V > E12I2/I-0+0.54 V ;

    Reducing power….I- > Br- > Cl- > F- ;

    Hydration enthalpy…F->Cl->Br->I-;

    MP and BP ….F2<Cl2<Br2<I2; Due to increased strength of London dispersion forces;

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