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Chemical Bonding and Molecular Structure question

2008 · Shift 0 · Q27
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  5. /2008 · Shift 0 · Q27

Chemical Bonding and Molecular Structure question

2008 · Shift 0 · Q27

JEE MainChemistryChemical Bonding and Molecular StructureMCQ+4 / −1
The bond dissociation energy of B - F in BF3BF_3BF3​ is 646 kJ mol-1 whereas that of C - F in CF4CF_4CF4​ is 515 kj mol-1. The correct reason for higher B - F bond dissociation energy as compared to that of C - F is
  1. A
    stronger σ\sigmaσ bond between B and F in BF3BF_3BF3​ as compared to that between C and F in CF4CF_4CF4​
  2. B
    significant pπ−pπp\pi - p\pipπ−pπ interaction between B and F in BF3BF_3BF3​ whereas there is no possibility of such interaction between C and F in CF4CF_4CF4​
  3. C
    lower degree of pπ−pπp\pi - p\pipπ−pπ interaction between B and F in BF3BF_3BF3​ than that between C and F in CF4CF_4CF4​
  4. D
    smaller size of B - atom as compared to that of C- atom.
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