Reactions of carboxylic acids

Among the following acids which has the lowest  ${\mathrm{pK}}_{\mathrm{a}}$ value?

A liquid was mixed with ethanol and a drop of concentrated H₂SO₄ was added. A compound with a fruity smell was formed. The liquid was:

Which amongst the following compounds has the highest acid strength?

${\mathrm{CH}}_3\mathrm{COOH}+{\mathrm{SOCl}}_2\stackrel{∆}{\to }$Products.

What are the products formed ?

Complete the following reaction.

Nitration of benzoic acid occurs at the meta position. Give reason.

Nitration of benzoic acid gives p-nitrobenzene.

Nitration of benzoic acid gives

Write the conversion of benzoic acid into nitrobenzoic acid.

The following transformation

can be carried out in three steps. The reagents required for these three steps in their correct order, are:

Which is the strongest acid? 

In the equation ${\mathrm{CH}}_3\mathrm{COOH} + {\mathrm{Cl}}_2 \underset{- \mathrm{HCl}}{\overset{\mathrm{Red} \mathrm{Phosphorus}}{\to }} \mathrm{A},$ the compound $\mathrm{A}$ is :

The product obtained when acetic acid is treated with ${\mathrm{PCl}}_3$ is:

When benzoic acid reacts with ammonia, product we get is _____.

During esterification reaction an alcohol and a _____ acid react with each other in the presence of acid to give esters.

Fischer esterification is:

${\mathrm{CH}}_3\mathrm{COOH}\to {\mathrm{CH}}_3{\mathrm{COOCOCH}}_3+{\mathrm{H}}_2\mathrm{O}$

In the above reaction, the number of moles of acetic acid required to prepare acetic anhydride is:

The correct increasing order of acidities is:
$\underset{1}{{\mathrm{ClCH}}_2\mathrm{COOH}}, \underset{2}{{\mathrm{Cl}}_2\mathrm{CHCOOH}}, \underset{3}{{\mathrm{Cl}}_3\mathrm{CCOOH}}$