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JEE Main & Advanced AIEEE Solved Paper-2002

  • question_answer
    \[PC{{l}_{3}}\] and \[PC{{l}_{5}}\], both exist; \[NC{{l}_{3}}\] exists but \[NC{{l}_{5}}\] does not exist. It is due to   AIEEE  Solved  Paper-2002

    A) lower electronegativity of P than N

    B) lower tendency of N to form covalent bond

    C) availability of vacant d-obital in P but not in N

    D) statement is itself incorrect

    Correct Answer: C

    Solution :

    Phosphorus (3rd period element) can raise covalency facilitating vacant d-orbitals which is not present in nitrogen.
    P (ground) [Ne]  \[3{{s}^{2}}\] \[3{{p}^{3}}\] 3o°
    P(excited)   [Ne] \[3{{s}^{1}}\] \[3{{p}^{3}}\] \[3{{d}^{1}}\]


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