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Suggest reasons why the B-F bonds lengt...

Suggest reasons why the B-F bonds lengths in `BF_3` (130 pm) and `BF_4^-` (143 pm ) differ.

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About `BF_3` :
`to` In `BF_3` the central atom .B. contains three bond pairs in the valency shell.
`to` .B. under goes `sp^2` hybridisation.
`to` Shape of the molecule is trigonal planar.
About `BF_4^-`:
`to` In `BF_4^-` the central atom .B. contains four bond pairs in the valency shell.
.B. under-goes `sp^3` hybridisation.
`to` Shape of the molecule is tetrahedral.
`to` The above reasons suggent that the difference in bond lengths of `BF_3` (130 pm) and `BF_4^-` (143 pm).
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VIKRAM PUBLICATION ( ANDHRA PUBLICATION)-THE P-BLOCK ELEMENTS GROUP-13-Short Answer Questions
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  2. What are electron deficient compounds ? Is BCl3 an electron deficient ...

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  18. Explain the structure of diborane.

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