JEE Main & Advanced JEE Main Paper (Held On 11 April 2014)

  • question_answer
    Which one of the following does not have a pyramidal shape?   [JEE Main Online Paper ( Held On 11 Apirl  2014 )

    A) \[{{(C{{H}_{3}})}_{3}}N\]                             

    B) \[{{(Si{{H}_{3}})}_{3}}N\]

    C) \[P{{(C{{H}_{3}})}_{3}}\]                              

    D) \[P{{(Si{{H}_{3}})}_{3}}\]

    Correct Answer: B

    Solution :

                    In case of \[N{{\left( Si{{H}_{3}} \right)}_{3}}N\]atom is \[s{{p}^{2}}\] hybridised, the lone pair is present in 2p orbital and it is transferred to empty d orbital of Si forming \[d\pi -p\pi \] bond. Hence nitrogen with \[s{{p}^{2}}\]hybridization has trigonal planar shape.


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