Chemical Bonding and Molecular Structure — JEE Main 2008 · Annual, Paper 1 · Q249

Question

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

Accepted Answer

(B) significant pπ - pπ interaction between B and F in BF₃ whereas there is no possibility of such interaction between C and F in CF₄

Answer

(A) stronger σ bond between B and F in BF₃ as compared to that between C and F in CF₄

Answer

(C) lower degree of pπ - pπ interaction between B and F in BF₃ than that between C and F in CF₄

Answer

(D) smaller size of B - atom as compared to that of C- atom.

Chemical Bonding and Molecular Structure: JEE Main 2008 Chemistry question

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Chemical Bonding and Molecular Structure: JEE Main 2008 Chemistry question

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