Which of the following compounds will form a significant amount of meta-product during a mono-nitration reaction?

In the given reaction,$[X]$ is:
$4-\text{nitrostyrene} \xrightarrow{[X]} 4-\text{ethylaniline}$

Azo-dyes are prepared from

In the reaction $A$ $\xrightarrow{SnCl_2/HCl} B$ $\xrightarrow{NaNO_2/HCl, 0^{\circ}C} C$ $\xrightarrow{H_2O/\Delta} C_6H_5OH$,what are $A, B$,and $C$?

Write the reactions for the final alkylation product of aniline with an excess of methyl iodide in the presence of sodium carbonate solution.

Identify the major product formed in the following sequence of reactions:
Aniline $\xrightarrow{Br_2/H_2O}$ $2,4,6-$Tribromoaniline $\xrightarrow{NaNO_2/HCl}$ $2,4,6-$Tribromobenzenediazonium chloride $\xrightarrow{H_3PO_2/H_2O}$ Product.