The acid formed when propyl magnesium bromide is treated with carbon dioxide is:

${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{COOH}\underset{\mathrm{red} \mathrm{P}}{\overset{{\mathrm{Cl}}_2}{\to }}\mathrm{A}\stackrel{\text{ alc.KOH }}{⟶}\mathrm{B}.$

What is $\mathrm{B}?$

Predict $\text{'}\mathrm{X}\text{'}$ in the above reaction.

Carboxylic acid groups do not give the usual addition and elimination reactions of aldehydes and ketones because:

When propionic acid is treated with aqueous sodium bicarbonate, ${\mathrm{CO}}_2$ is liberated. The $\text{'}\mathrm{C}\text{'}$ of ${\mathrm{CO}}_2$ comes from:

Which one of the following orders of acid strength is correct?

Identify $\mathrm{Z}$ in the following reaction sequence:

${\mathrm{CH}}_3\mathrm{CHO}\underset{\mathrm{Dilute} {\mathrm{H}}_2{\mathrm{SO}}_4}{\overset{{\mathrm{MnO}}_4^{-}}{\to }}\mathrm{X}\stackrel{{\mathrm{SOCl}}_2}{\to }\mathrm{Y}\underset{∆}{\overset{{\mathrm{CH}}_3\mathrm{COONa}}{\to }}\mathrm{Z}$