Coupling of benzene diazonium chloride with $1$-naphthol in alkaline medium will give:

Which among the following statements is true about the reactivity of haloarenes towards nucleophilic substitution reactions?
$1$. Haloarenes are very reactive towards nucleophilic substitution reaction.
$2$. In haloarenes,the $C-X$ bond acquires partial double bond character.
$3$. The $C-X$ bond in haloarenes is longer than the $C-X$ bond in haloalkanes.
$4$. In haloarenes,the phenyl cation formed as a result of self-ionisation is stable.

Which of the following reagents cannot be used in a Friedel-Crafts reaction?

What is the correct order of $o/p$ ratio when $E^{+}$ attacks the following systems?
$(A): Ph-F, (B): Ph-Cl, (C): Ph-Br, (D): Ph-I$

$p-$Nitrotoluene on further nitration gives :

Which of the following compounds has a dipole moment approximately equal to that of chlorobenzene?