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After a discussion about the structures ...

After a discussion about the structures of hydrides of group-15 elements, .Neethu wrote the order of bond angles as `NH_3ltPH_3ltAsH_3`. Justify ‘your answer:

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The bond angle decreases from `NH_3`to `BiH_3`,i.e., the correct order of bond’ angle is `NH_3gtPH_3gtAsH_3`.As the size of the central atom in the hydride increases, its electronegativity. decreases, Consequently the position of the bond pair of electrons tend to lie away from the central atom in moving from `NH_3` to `AsH_3` As a result the repulsion between bond pair of electrons' ' decreases and the bond angle decreases.
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After a discussion about the structures of hydrides of group-15 elements, .Neethu wrote the order of bond angles as NH_3ltPH_3ltAsH_3 . Is this the correct order?

After a discussion about the structures of hydrides of group-15 elements, .Neethu wrote the order of bond angles as NH_3ltPH_3ltAsH_3 . Give the hybridization and shape of these hydrides.

Knowledge Check

  • Hydrides of elements of Groups 3–5 are generally called

    A
    interstitial hydrides
    B
    ionic hydrides
    C
    polymeric hydrides
    D
    complex hydrides

  • Hydrides of elements of Groups 3–5 are generally called

    A
    interstitial hydrides
    B
    ionic hydrides
    C
    polymeric hydrides
    D
    complex hydrides

  • The bond angles of NH_3, NH_4^+ and NH_2^- are in the order:

    A
    `NH_2^- gt NH_3 gt NH_4^+`
    B
    `NH_4^+ gt NH_3 gt NH_2^-`
    C
    `NH_3 gt NH_2^- gt NH_4^+`
    D
    `NH_3 gt NH_4^+ gt NH_2^-`

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    After a discussion about the structures of hydrides of group-15 elements, .Neethu wrote the order of bond angles as NH_3ltPH_3ltAsH_3 . Also arrange the above hydrides in the increasing order of their thermal stability. Justify your answer.

    Bond angle in NH_3 is more than in H_2O . Justify.

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    Why is 'BiH_3' the strongest reducing agent amongst all the hydrides of group 15 elements?

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