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Fluorine is more electronegative than ei...

Fluorine is more electronegative than either boron or phosphorous. What conclusion can be drawn from the fact that `BF_(3)` has no dipole moment but `PF_(3)` does

A

`BF_3` is not spherically symmetrical but `PF_3` is

B

`BF_3` molecule must be linear

C

The atomic radius of P is larger than the atomic radius of B

D

The `BF_3` molecule must be planar triangular

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The correct Answer is:
D
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As N-F bond is more polar than N-H bond, NF_(3) molecule has higher dipole moment than NH_(3) .

As the electronegative increases from iodine to fluorine, the bond angle _________, from PI_(3) to PF_(3) .

Knowledge Check

  • Fluorine is more electronegative than either boron or phosphorus. What conclusion can be drawn from the fact that BF_(3) has no dipole moment nut PF_(3) does ?

    A
    `BF_(3)` is not spherically symmetrical but `PF_(3)` is
    B
    `BF_(3)` molecule must be linear
    C
    The atomic radius of P is larger than that of B
    D
    The `BF_(3)` molecule must be planar triangular

  • CH_(3)Cl has more dipole moment than CH_(3)F because :

    A
    electron affinity of chlorine is greater than that of fluorine
    B
    the charge separation is larger in `CH_(3)Cl` compared to `CH_(3)F`
    C
    the repulsion between the bond pairs and non-bonded pairs of electrons is greater in `CH_(3)Cl` than `CH_(3)F`
    D
    chlorine has higher electronegativity than fluorine

  • As the electronegative increases from iodine to fluorine, the bond angle _________, from PI_(3) to PF_(3) .

    A
    increases
    B
    remains same
    C
    decreases
    D
    doubled
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