Which compound will not undergo decarboxylation on heating?

In the reaction,the product $D$ is:
$CH_2=CH_2$ $\xrightarrow{Br_2/CCl_4} A$ $\xrightarrow{KCN} B$ $\xrightarrow{H_3O^{+}} C$ $\xrightarrow{\Delta} D$

Identify the product of the following reaction:
$C_6H_5COCl \xrightarrow{H_2O} \text{Product}$

The reaction,$CH_3-CO-OCH_3 + C_2H_5OH \xrightarrow{H^{+} \; \text{or} \; OH^{-}} CH_3-CO-OC_2H_5 + CH_3OH$ is called

The descending order of acidity for the following carboxylic acids is:
$A.$ $CH_3COOH$
$B.$ $F_3C-COOH$
$C.$ $ClCH_2-COOH$
$D.$ $FCH_2-COOH$
$E.$ $BrCH_2-COOH$
Choose the correct answer from the options given below:

Identify the product $B$ in the following reaction.
$C_6H_5COCl + H_2O \rightarrow B + HCl$