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Resonance in a molecule results in...

Resonance in a molecule results in

A

Destabilisation

B

Stabilisation

C

Change in bond length

D

Both 2 and 3

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The correct Answer is:
D
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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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Caliene, C_(7)H_(6) , is expected to be a fairly polar aromatic molecular. Which of the following resonance formss contributes to the greatest extent towards the real structure (resonance hybrid) of the molecule ?

AAKASH INSTITUTE-ORGANIC CHEMISTRY: SOME BASIC PRINCIPLE AND TECHNIQUES-ASSIGNMENT SECTION-A COMPETITION LEVEL QUESTIONS
  1. Electromeric effect:

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  2. The reaction intermediate produce by homolytic cleavage of bond is cal...

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  3. Ammonia is iso-structural with:

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  4. A mixture of camphor and benzoic acid can be separated by

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  5. In Kjeldahl's method, nitrogen present is estimated as :

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  6. In sodium fusion test of organic compounds, the nitrogen of an organic...

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  7. In Dumas' method, the gas (or vapor) which is collected in the nitrome...

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  8. 0.2 g of an organic compound on comptete combustion produces 0.18 g of...

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  9. In a Lassaigne's test for sulphur in the organic compound with sodium ...

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  10. Lassaigne's test for the detection of nitrogen will fail in case of :

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  11. The Lassaigne's extract is boiled with dil. HNO(3) before testing for ...

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  12. The purity of an organic compound is determined by

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  13. 0.32 g of an organic compound gave 0.233 g of BaSO(4). Determine the p...

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  14. Hyperconjugation is most useful for stabilizing which of the following...

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  15. Resonance in a molecule results in

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  16. Hyperconjugation involves overlap of which of the following orbitals?

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  17. How many bonds are there in

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  18. this hydrocarbon has hybridization

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  19. Considering the state of hybridization of carbon atoms, find out the m...

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  20. The best and latest technique for isolation, purification and separati...

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