The number of $\pi$-bonds and lone pair$(s)$ present in the major benzenoid product,which is formed when benzene reacts with acetyl chloride in the presence of anhydrous aluminium chloride,are respectively:

The total number of isomeric trimethylbenzene is

Aromatisation of $n$-heptane by passing over $(Al_2O_3 + Cr_2O_3)$ catalyst at $773 \ K$ gives:

The correct order of the rate of $EAS$ (electrophilic aromatic substitution) for the following compounds is:

In which of the following reactions,$t$-butyl benzene is formed?
$1.$ Benzene $+ t$-butyl chloride $\xrightarrow{AlCl_3}$
$2.$ Benzene $+ (CH_3)_2C=CH_2 \xrightarrow{BF_3/HF}$
$3.$ Benzene $+ t$-butyl alcohol $\xrightarrow{H_2SO_4}$
$4.$ Benzene $+$ butanoyl chloride $\xrightarrow{AlCl_3}$ $\xrightarrow{Zn/Hg, HCl}$

The following compound has four aromatic rings marked as $A$,$B$,$C$ and $D$. Rank them in terms of increasing reactivity towards electrophilic aromatic substitution?