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BF3 is non-polar but NH3 is polar. Why?...

`BF_3 ` is non-polar but `NH_3` is polar. Why?

Answer

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Knowledge Check

  • The molecules BF_3 and NF_3 are covalent compounds. But BF_3 is non-polar and NF_3 is polar. The reason is

    A
    Boron is a metal and nitrogen is a gas in uncombined state
    B
    BF bonds have no dipole moment where as NF bonds have dipole moment
    C
    Atomic size of boron is smaller that that of nitrogen
    D
    `BF_3 ` is planar but `NF_3` is pyramidal in shape

  • (A) PCl_(3) is non-polar, but PCl_(5) is polar (R ) PCl_(3) has unsymmetrical structure, but PCl_(5) is symmetrical

    A
    Both (A) and (R ) are true and (R ) is the correct explanation of (A)
    B
    Both (A) and (R ) are true and (R ) is not the correct explanation of (A)
    C
    (A) is true but (R ) is false
    D
    Both (A) and (R ) are false

  • (A) Compared to Br_(2),Icl is more reactive (R ) Br_(2) is non -polar ,but Icl is polar

    A
    Both (A) and (R ) are true and (R ) is the correct explanation of (A)
    B
    Both (A) and (R ) are true and (R ) is not the correct explanation of (A)
    C
    (A) is true but (R ) is false
    D
    Both (A) and (R ) are false

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    Bond polarity is least in

    Bond polarity is least in

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