A, P, X, B and E are the elements belonging to 15th group of Modern periodic table. The correct trend of density in these elements is A > P > X > B > E. The element ‘A’ in the sequence is

A, P, X, B and E are the elements belonging to 15th group of Modern periodic table. The correct trend of density in these elements is A > P > X > B > E. The element ‘A’ in the sequence is

  1. A

    Sb

  2. B

    Bi

  3. C

    As

  4. D

    P

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    Solution:

    Atomic radius ; N<P<As<Sb<Bi ;

    Ionization enthalpy…N>P>As>Sb>Bi ;

    Melting pointAs>Sb>Bi>P>N ;

    Boiling point….N<P<As<Bi<Sb ;

    Density……….N<P<As<Sb<Bi ;

    Electronegativity……N>P>As>Sb=Bi ;

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