Ammonium acetate reacts with acetic acid at $110\,^{\circ}C$ to form:

When ethyl alcohol reacts with acetic acid,the products formed are

Identify $C$ in the following sequence of reactions:
$2\text{-methylcyclohexanecarboxylic acid}$ $\xrightarrow{SOCl_2} A$ $\xrightarrow{NH_3} B$ $\xrightarrow{P_4O_{10}, \text{heat}} C(C_8H_{13}N)$

$X \xrightarrow{PCl_5} C_2 H_5 Cl$
$Y \xrightarrow{PCl_5} CH_3 COCl$
$X$ and $Y$ are:

Heating chloroform with aqueous sodium hydroxide solution forms:

For which carboxylic acid,the $pK_a$ is the lowest :