Product $(A)$ of the above reaction is

What is the reason for the solubility of low molecular weight carboxylic acids in water?

$A$ is a high molecular weight phenol and $B$ is an aromatic carboxylic acid. Which of the following would you use to separate a mixture of $A$ and $B$?

Consider the following compounds:
$(i) \, C_6H_5COCl$
$(ii) \, p-NO_2-C_6H_4-COCl$
$(iii) \, p-CH_3-C_6H_4-COCl$
$(iv) \, p-CHO-C_6H_4-COCl$
The correct decreasing order of their reactivity towards hydrolysis is:

The reaction of acetamide with water is an example of

Which of the following compounds will react with $NaHCO_3$ solution to give sodium salt and carbon dioxide?