Select the incorrect statement about N2F4 and N2H4 : (I) In N2F4, d-orbitals are contracted by electronegative fluorine atoms, but d-orbital contraction is not possible by H-atom in N2H4 (II) The N—N

Question

Select the incorrect statement about N2F4 and N2H4 : (I) In N2F4, d-orbitals are contracted by electronegative fluorine atoms, but d-orbital contraction is not possible by H-atom in N2H4 (II) The N—N bond energy in N2F4 is more than N—N bond energy in N2H4 (III) The N—N bond length in N2F4 is more than that of in N2H4 (IV) The N—N bond length in N2F4 is less than that of in N2H4 Choose the correct code :

Prashant Kotian · Accepted Answer

Correct answer: B. It can be explained on the basis of Bent's rule. In N2F4, N—N bond has more s-character hence bond length decreases. While in N2H4, N—N bond has less s-character (i.e., more p-character), hence bond lengths.

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