The compound that is most reactive towards electrophilic nitration is

The 'middle oil' fraction of coal tar distillation contains

What is the major product of the following reaction?
$1,4-dichlorocyclohexa-1,4-diene \xrightarrow{Na, \text{dry ether}} ?$

For the following Friedel-Crafts alkylation reaction, which of the statements are correct?
$A$. Major product is n-propyl benzene.
$B$. iso-propyl carbocation intermediate is also generated.
$C$. Multiple substitution is inevitable.
$D$. Introducing electron-donating substituent on benzene will not produce any alkyl benzene.

Rank the following compounds in order of increasing rate of reaction towards Electrophilic Aromatic Substitution $(EAS)$ with bromine in the presence of $FeBr_3$.

The reaction is given as:
Naphthalene + Oxalyl chloride $\xrightarrow{AlCl_3} [X]$ $\xrightarrow{Na-Hg, HCl \text{ (excess)}} [Y]$
Product $Y$ is: