`BF_3`

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
`underset("Ground state")(B)-2s^(2)2p^1`
`underset("Excited state")(B)ubrace(-2s^(1)2p_(x)^(1)2p_(y)^(1))2p_z^0`
Since the octet around B is incomplete, it behaves as an electron-deficient compound. `BF_3` can accept a pair of electron from some other ion/molecule in vacant 2p orbital and thus behave as a Lewis acid .
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