In the following reaction sequence,identify $Q$:
$p\text{-Chloronitrobenzene}$ $\xrightarrow[\Delta, P]{NaOH} P$ $\xrightarrow{C_6H_5CH_2Cl} Q$

Identify $A$ in the following reaction: $A + \text{Acetic anhydride} \xrightarrow{H^{+}} \text{Aspirin} + \text{Acetic acid}$

What are the products formed by the reaction of phenol with dilute $HNO_3$? By which method are these products separated,and what is the name of the compound that separates out and the reason for it?

What is the major product formed when phenol reacts with sodium hydroxide and carbon dioxide?

Reaction of phenol with $NaOH$ followed by heating with $CO_{2}$ under high pressure,and subsequent acidification gives compound $X$ as the major product,which can be purified by steam distillation. When reacted with acetic anhydride in the presence of a trace amount of conc. $H_{2}SO_{4}$,compound $X$ produces $Y$ as the major product. Compound $Y$ is $....$

If the reaction sequence given below is carried out with $15$ moles of acetylene,the amount of the product $D$ formed (in $g$) is. . . . . The yields of $A, B, C$ and $D$ are given in parentheses. [Given: Atomic mass of $H=1, C=12, O=16, Cl=35$]