PCl5 exists but NCl5 does not. This is because of

  1. A

    High electronegativity of nitrogen

  2. B

    High ionisation energy of nitrogen

  3. C

    Smaller atomic size of nitrogen

  4. D

    Absence of d-orbitals in the valence shell of nitrogen

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    Solution:

    The valency of an element depends on the availability of d-orbitals. The electrons may undergo excitation and expand the octet also.

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