NEET Sample Paper NEET Sample Test Paper-1

  • question_answer 52) The correct increasing bond angles order is:

    A)  \[B{{F}_{3}}<N{{F}_{3}}<P{{F}_{3}}<Cl{{F}_{3}}\]

    B)  \[Cl{{F}_{3}}<P{{F}_{3}}<N{{F}_{3}}<B{{F}_{3}}\]

    C)  \[B{{F}_{3}}\approx N{{F}_{3}}<P{{F}_{3}}<Cl{{F}_{3}}\]

    D)  \[B{{F}_{3}}<N{{F}_{3}}<P{{F}_{3}}<Cl{{F}_{3}}\]

    Correct Answer: B

    Solution :

    \[B{{F}_{3}}\] has \[s{{p}^{2}}\] hybridization and \[{{120}^{o}}\] bond angle (maximum). Its structure is planar. Higher the electronegativity of central atom (in \[s{{p}^{3}}\] hybridized) larger the bond angle but presence of lone pair of electrons decreases the  bond angle. Greater the number of lone pair of electrons lower the bond angle.

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