The compound that undergoes decarboxylation most readily under mild conditions is:

Rearrange the following in the increasing order of acidic strength:
$(i)$ benzoic acid $(ii)$ $p$-methoxybenzoic acid $(iii)$ $o$-methoxybenzoic acid

The reaction of benzoic acid with methanol in the presence of an acid catalyst $(H^+)$ is shown below. Identify the correct product.
$C_6H_5COOH + CH_3O^{18}H \xrightarrow{H^+} \text{Product}$

The compound that does not give the iodoform test is

When compound $A$ reacts with methyl alcohol in the presence of a few drops of $H_2SO_4$,it forms oil of wintergreen. What is compound $A$?

Product $B$ in the following reaction is: $CH_3-COOH$ $\xrightarrow{NH_3, \Delta} A$ $\xrightarrow{P_2O_5, \Delta} B$