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The bond dissociation energy of B-F in BF_{3} is 646 kJ mol -1 whereas that of C-F in CF_{4} is 515 kJ mol -1 The correct reason for higher B-F bond dissociation energy as compared to that of C-F is

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best_answer The bond dissociation energy of B-F in BF3 is 646 kJ mol -1 whereas that of C-F in CF4 is 515 kJ mol -1 The correct reason for higher B-F bond dissociation energy as compared to that of C-F is Bond length between two atoms. the atomic size of boron is smaller than carbon, so the strength of the bond of B-F will higher than C-F.
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