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A resonance hybrid is always more stable...

A resonance hybrid is always more stable than any of its canonical structures.
This stability is due to delocalization of electrons.

A

If both assertion and reason are true and the reason is the correct explanation of the assertion.

B

If both assertion and reason are true but reason is not the correct explanation of the assertion.

C

If assertion is true but reason is false

D

If assertion is false but reason is true.

Text Solution

Verified by Experts

The correct Answer is:
A
(a) We know that a resonance hybrid or the actual molecule is always more stable than any of its canonical structures which is also called hypothetical or imaginary structures. The stability is due delocalization of electrons and is measured in terms of resonance energy or delocalization energy, it is defined as the difference in internal energy of the resonance hybrid and the most stable canonical structure. Therefore, both the assertion and reason are true and the reason is a correct explanation of the assertion.
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Which of the following statements is (are) true about resonance. (a) Resonance is an intramolecular process. (b) Resonance involves delocalization of both sigma " and " pi electrons. (c )Resonance involves delocalization of pi electrons and lone pair only. (d) Resonance decreases potential energy of a molecule. (e ) Resonance has no effect on the potential energy of a molecule. (f)Resonance is the only way to increase molecular stability. (g) Resonance is not the only way to increase molecular stability. (h) Any resonating molecule is always more stable than any nonresonating molecule. (i) The canonical structure explains all features of a molecule. (j) The resonance hybrid explains all features of a molecule. (k)Resonating structures are real and resonance hybrid is imaginary. (l) Resonance hybrid is real and resonating structures are imaginary. (m) Resonance hybrid is always more stable than all canonical structures.

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