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BF(3) is....

`BF_(3)` is.

A

Electron-deficient compound

B

Lewis acid

C

Used as rocket fuel

D

Ionic compound

Text Solution

Verified by Experts

The correct Answer is:
A, B

Since the octet around `B` is incomplete, it behaves as an electron-deficient compound. `BF_(3)` can acceot a pair of electron from some other ion//molecule in vacant `2p` orbital and thus behaves as a Lewis acid.
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Wrtie the state of hybridisation of boron in BF_(3) .

(a) Explain why BF_(3) exists whereas BH_(3) does not. (b) Compare the B-F bond length in BF_(3) and BF_(4)^(-)

Knowledge Check

  • BF_(3) exist monomer but not dimer because:

    A
    Boron cannot coordinate with four fluorine atoms to form dimer
    B
    Dimerisation of `BF_(3)` leads to the rehybridiation bond character
    C
    `BF_(3)` is ionic compound
    D
    of steric hinderence

  • Which is/are true in case of BF_(3) ?

    A
    It is volatile liquid even at room temperature
    B
    It is Lewis acid
    C
    It has planer geometry
    D
    It forms adduct with `NH_(3)`

  • Back bonding in BF_(3) does not afect

    A
    planarity, lewis acidic strength and bond angle
    B
    bond length, hybridisation and bond strength
    C
    bond angle, planarity, geometry
    D
    Lewis acidity, bond length, bond order (B-F)

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    BF_(3) exists as discrete molecules but BH_(3) exists as dimer. Explain .

    In the reaction between BF_(3) and NH_(3) , BF_(3) acts as ...........whereas NH_(3) acts as ...........

    BF_(3) does not obey the octet rule.

    BF_(3) acts as acid according to the concept of

    The function of anhydrous BF_(3) in the Friedel-Crafts reaction is

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