In $CH_3(3) - CH_2(2) - CH_2(1) - Cl$,give the increasing order of the inductive effect for carbon atoms $1, 2,$ and $3$.

With respect to the compounds $I-V$,choose the correct statement$(s)$.
$(A)$ The acidity of compound $I$ is due to delocalization in the conjugate base.
$(B)$ The conjugate base of compound $IV$ is aromatic.
$(C)$ Compound $II$ becomes more acidic,when it has a $-NO_2$ substituent.
$(D)$ The acidity of compounds follows the order $IV > V > I > II > III$.

Define the electromeric effect and describe its types.

In which of the following does the hyperconjugation effect operate?

Arrange the following compounds in increasing order of the rate of aromatic electrophilic substitution reaction:

The total number of contributing structures showing hyperconjugation (involving $C-H$ bonds) for the following carbocation is