Phthalic acid reacts with resorcinol in the presence of concentrated $H_2SO_4$ to give

Which of the following reagents is used in the conversion of phenol to picric acid?

$Phenol$ $\xrightarrow[Distillation]{Zn} A$ $\xrightarrow[Conc. H_2SO_4]{Conc. HNO_3} B$ $\xrightarrow[NaOH]{Zn} C$
In the above reaction,$A$,$B$,and $C$ are the following compounds:

How can picric acid and benzoic acid be distinguished?

Which among the following compounds has the highest solubility in water?

In the above sequence of reactions,the major products $X$ and $Y$ are