Identify correct statements from the following.
A) Energy of resonance hybrid is less than the energy of any single canonical structure.
B) Resonance averages the bond characterisics as a whole.
C) Canonical forms have no real existence.
D) There exists a dynamic equilibrium between the canonical forms.

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A, B, C, D

B, C and D only

A, B and D only

A, B and C only

answer is C.

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Detailed Solution

A) Energy of resonance hybrid is less than the energy of any single canonical structure.

Difference in the Energy of resonance hybrid and most stable canonical structure is resonance energy.

B) Resonance averages the bond characterisics as a whole.

O-O bond length in ozone is intermediate of single bond and double bond lengths.

C) Canonical forms have no real existence.

D) No dynamic equilibrium exists between the canonical forms.

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