$A$ 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 $B$?

Acetic anhydride reacts with ammonia to give the product:

Assertion $(A)$: Carboxylic acids are more acidic than Phenols.
Reason $(R)$: Resonance structures of carboxylate ion are equivalent,while resonance structures of phenoxide ion are not equivalent.

Identify the suitable reagents for the following conversion:

Which of the following is the strongest acid?

$EtO-CO-OEt \xrightarrow[(2) H_3O^{+}]{(1) CH_3MgBr \text{ (excess)}} (A)$,Product $(A)$ is: