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Resonance is delocalisation of :...

Resonance is delocalisation of :

A

`pi` electrons

B

`sigma` electrons

C

`sigma-pi` electrons

D

None

Text Solution

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The correct Answer is:
A
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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.

In which of the following carbocations, delocalisation of positive charge is possible :

Select the correct statement (i). Delocalisation of sigma -electron is hyperconjugation. (ii). Delocalisation of pi -electron is resonance. (iii). Partial displacement of sigma -electron is inductive effect.

In which delocalisation of positive charge is possible