Resonance

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.

For the compound : Give the number "1" for presence of resonance only,"2" for presence of resonance and hyperconjugation only,"3" for presence of resonance, hyperconjugation and inductive effect and "4" for presence of resonance hyperconjugation, inductive effect and electromeric effect.

In series L-C-R resonant circuit, to increase the resonant frequency

In resonant circuit, at resonant frequency

Reson Of Elasticity