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The bond dissociation energy of BF in BF3 is 646kJmol1 whereas that of CF in CF4 is 515kJmol1. The correct reason for higher BF bond dissociation energy as compared to that of CF is :


( A ) stronger σ bond between B and F in BF3 as compared to that between C and F in CF4
( B ) smaller size of B-atom as compared to that of C-atom
( C ) lower degree of pπpπ interaction between B and F in BF3 than that between C and F in CF4.
( D ) significant pπpπ interaction between B and F in BF3 whereas there is no possibility of such interaction between C and F in CF4

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