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Chemistry · CHEMICAL BONDING AND MOLECULAR STRUCTURE
हिन्दीGiven below are statements regarding resonance and dipole moments: (A) The canonical forms in resonance have real existence and are in dynamic equilibrium with each other. (B) The energy of the resonance hybrid is lower than that of any single canonical structure. (C) In \( \text{NF}_3 \), the orbital dipole resulting from the lone pair reinforces the resultant dipole moment of the three \( \text{N}-\text{F} \) bonds. (D) For transition metal cations with configuration \( (n-1)d^{10}ns^0 \), the polarising power is greater than that for noble gas configuration \( ns^2 np^6 \) cations of the same size and charge. Choose the correct answer from the options given below:
Correct answer · Option 2
(B) and (D) only
Explanation
(A) is incorrect (canonical forms have no real existence and are not in equilibrium). (B) is correct. (C) is incorrect (orbital dipole opposes N-F bond dipoles in NF3). (D) is correct (Fajans' rule for pseudo noble gas cations).
