The basic strength of $1,8-$bis(dimethylamino)naphthalene is $10^{10}$ times more than $1-$dimethylaminonaphthalene. The reason for this high basic strength is:

Which group exhibits the maximum hyperconjugation effect?

Which of the indicated $H$ in the following is most acidic?

The most stable carbocation among the following is:

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.

The decreasing order of reactivity towards electrophilic substitution for the following compounds is: