JEE Main & Advanced Chemistry The p-Block Elements-I / p-ब्लॉक के कुछ तत्व-I Question Bank Boron Family

  • question_answer
    In diborane, the two \[H-B-H\] angles are nearly [AIIMS 2005]

    A) \[60{}^\circ \,,\text{ }120{}^\circ \]

    B) \[95{}^\circ \,,\text{ }120{}^\circ \]

    C) \[95{}^\circ \,,\text{ }150{}^\circ \]

    D) \[120{}^\circ \,,\text{ }180{}^\circ \]

    Correct Answer: B

    Solution :

    Dilthey in 1921 proposed a bridge structure for diborane. Four hydrogen atoms, two on the left and two on the right, known as terminal hydrogens and two boron atoms lie in the same plane. Two hydrogen atoms forming bridges, one above and other below, lie in a plane perpendicular to the rest of molecule.


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