The electromeric effect in organic compounds is a....

Which of the following does not show hyperconjugation?

State True or False for the following statements:
$(i)$ The stability of carbocation is explained by the delocalized structure of hyperconjugation.
$(ii)$ The stability of carbocation is explained by drawing the resonance structure.
$(iii)$ Hyperconjugation effect is $(+)$ or $(-)$.
$(iv)$ Mesomeric effect is $(+)$ or $(-)$.

In which of the following is hyperconjugation not possible?

State True or False for the following statements:
$(i)$ The stability is explained by resonance effect and hyperconjugation.
$(ii)$ The resonance structures are drawn in resonance and hyperconjugation.
$(iii)$ Hyperconjugation is a bondless resonance.
$(iv)$ In resonance structure,there is movement of electron pair of only $\pi$ bond.

From the following,identify the groups that exhibit negative resonance $(-R)$ effect when attached to a conjugated system: $(A)$ formyl,$(B)$ amino,$(C)$ alkoxy,$(D)$ cyano,$(E)$ nitro