Phenol condenses with phthalic anhydride in the presence of conc. $H_2SO_4$ to form:

The correct order of decreasing acidity of nitrophenols is:

The nitration of phenol with dilute $HNO_3$ at low temperature yields a mixture of two isomers $(A)$ and $(B)$. Product $(A)$ is more volatile than product $(B)$. Identify $(A)$.

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

When phenol is treated with chloroform in the presence of sodium hydroxide,followed by hydrolysis in the presence of an acid,the product formed is:

What is the product obtained in the Reimer-Tiemann reaction?