Which of the following is the strongest base?

In the given reaction sequence,$[X]$ will be:

Which of the following reagents is used in the Hoffmann elimination reaction of amines?

The mass of benzanilide obtained from the benzoylation reaction of $5.8 \ g$ of aniline, if the yield of product is $82\%$, is . . . . . . $g$ (nearest integer).
(Given molar mass in $g \ mol^{-1}$: $H: 1, C: 12, N: 14, O: 16$)

What is the expected order of basic strength of different compounds from the following in the aqueous phase?

$A$ solution contains $1 \ g \ mol$ each of $p-$toluene diazonium chloride and $p-$nitrophenyl diazonium chloride. To this,$1 \ g \ mol$ of alkaline solution of phenol is added. Predict the major product and explain your answer.