$Ph-CO_2H$ $\xrightarrow{SOCl_2} A$ $\xrightarrow{Me_2NH} B$ $\xrightarrow{(C)} Ph-CHO$. The unknown reagent $(C)$ is:

Compare the acidity among mineral acids,carboxylic acids,phenols,and alcohols.

$A$ liquid was mixed with ethanol and a drop of concentrated $H_2SO_4$ was added. $A$ compound with a fruity smell was formed. The liquid was :

Identify the reagent used in the following reaction: $\text{Benzoic acid} \xrightarrow[\Delta]{\text{Reagent}} \text{Benzoyl chloride} + \text{Phosphorus oxychloride} + \text{Hydrogen chloride}$.

Which of the following is most reactive for nucleophilic substitution reaction?

What is the product of the pyrolysis of ethyl acetate?