Which of the following compounds will give an ester with acid chloride?

Which of the following compounds is the most acidic?

Arrange the following compounds in decreasing order of their acidic strength.

Identify $(C)$ in the reaction$(s)$:
$p\text{-toluidine}$ $\xrightarrow[{0\,^{\circ}C}]{{NaNO_2/HCl}}\,(A)\,$ $\xrightarrow{{{H_2}O, \Delta }}\,(B)\,$ $\xrightarrow[{(ii)\,dil.\,HCl}]{{(i)\,CHCl_3, KOH, \Delta }}\,(C)$

Write the steps to carry out the conversion of phenol to aspirin.

The main product of the following reaction will be: